An apparatus, comprising: a console for disposition between at least two seats within a vehicle interior, the console including: a spine member including an upper surface extending in a longitudinal direction, at least first and second opposing side surfaces (620, 622) extending transversely from the upper surface, and a plurality of receptacles disposed in spaced apart relation along the spine member in the longitudinal direction and communicating with respective apertures at the upper surface, wherein the receptacles further comprise of: one or more side wall surfaces, and a bottom surface; and at least one user accessory module including: (a) at least one protrusion extending from the user accessory module and through one of the apertures, the at least one protrusion being sized and shaped to couple to, and be received within, at least one of the receptacles of the spine member such that the at least one user accessory module is operative to connect to the spine member at any of a plurality of user-definable positions along the longitudinal direction, wherein the protrusion further comprises at least one of: one or more side wall surfaces, and a bottom surface; and (b) at least one cavity defining at least first and second inwardly opposing side surfaces (730, 732), which are sized and shaped to engage the respective first and second opposing side surfaces (620, 622) of the spine member (600; 200) wherein the respective side wall surfaces (642; 712) of the receptacles and the protrusion communicate with one another, and the first and second opposing side surfaces (620, 622) of the spine member and the first and second inwardly opposing side surfaces (730, 732) of the cavity communicate with one another, to form a tight and snug configuration. a console for disposition between at least two seats within a vehicle interior, the console including: a spine member including an upper surface extending in a longitudinal direction, at least first and second opposing side surfaces (620, 622) extending transversely from the upper surface, and a plurality of receptacles disposed in spaced apart relation along the spine member in the longitudinal direction and communicating with respective apertures at the upper surface, wherein the receptacles further comprise of: one or more side wall surfaces, and a bottom surface; and at least one user accessory module including: (a) at least one protrusion extending from the user accessory module and through one of the apertures, the at least one protrusion being sized and shaped to couple to, and be received within, at least one of the receptacles of the spine member such that the at least one user accessory module is operative to connect to the spine member at any of a plurality of user-definable positions along the longitudinal direction, wherein the protrusion further comprises at least one of: one or more side wall surfaces, and a bottom surface; and (b) at least one cavity defining at least first and second inwardly opposing side surfaces (730, 732), which are sized and shaped to engage the respective first and second opposing side surfaces (620, 622) of the spine member (600; 200) wherein the respective side wall surfaces (642; 712) of the receptacles and the protrusion communicate with one another, and the first and second opposing side surfaces (620, 622) of the spine member and the first and second inwardly opposing side surfaces (730, 732) of the cavity communicate with one another, to form a tight and snug configuration. a spine member including an upper surface extending in a longitudinal direction, at least first and second opposing side surfaces (620, 622) extending transversely from the upper surface, and a plurality of receptacles disposed in spaced apart relation along the spine member in the longitudinal direction and communicating with respective apertures at the upper surface, wherein the receptacles further comprise of: one or more side wall surfaces, and a bottom surface; and at least one user accessory module including: (a) at least one protrusion extending from the user accessory module and through one of the apertures, the at least one protrusion being sized and shaped to couple to, and be received within, at least one of the receptacles of the spine member such that the at least one user accessory module is operative to connect to the spine member at any of a plurality of user-definable positions along the longitudinal direction, wherein the protrusion further comprises at least one of: one or more side wall surfaces, and a bottom surface; and (b) at least one cavity defining at least first and second inwardly opposing side surfaces (730, 732), which are sized and shaped to engage the respective first and second opposing side surfaces (620, 622) of the spine member (600; 200) (a) at least one protrusion extending from the user accessory module and through one of the apertures, the at least one protrusion being sized and shaped to couple to, and be received within, at least one of the receptacles of the spine member such that the at least one user accessory module is operative to connect to the spine member at any of a plurality of user-definable positions along the longitudinal direction, wherein the protrusion further comprises at least one of: one or more side wall surfaces, and a bottom surface; and (b) at least one cavity defining at least first and second inwardly opposing side surfaces (730, 732), which are sized and shaped to engage the respective first and second opposing side surfaces (620, 622) of the spine member (600; 200)