A base for mounting on a support, the base comprising: a body including an interior cavity for an electronic component, a bottom surface extending between a support location and an actuation location; a latch assembly including a release member on the surface and, an actuator at said actuation location, a first attachment member (60, 62) adjacent the support location; and a latch member adjacent the support location, the latch member including a second attachment member engageable with said first attachment member (60, 62) to mount the latch member on the release member, and a latch engageable with the support; and the latch assembly is movable toward and away from the support location to engage and disengage the support; characterized in that the body further comprises: a first wall extending along said bottom surface; a first recess in said first wall; a retention member adjacent the support location; the release member extends along the first wall and comprises a first projection on a side of the release member adjacent the first wall; the release member having an assembly position away from the support location with said first projection physically engaging the first wall adjacent the first recess to prevent movement of the release member along the surface and permit mounting of the latch member on the release member by engagement between said first (60, 62) and second attachment members; and the latch assembly having an operative position where the release member is closer to the support location than when in the assembly position, the first projection is in said first recess, and a portion of the latch member engages the retention member to secure the latch member on the base. a body including an interior cavity for an electronic component, a bottom surface extending between a support location and an actuation location; a latch assembly including a release member on the surface and, an actuator at said actuation location, a first attachment member (60, 62) adjacent the support location; and a latch member adjacent the support location, the latch member including a second attachment member engageable with said first attachment member (60, 62) to mount the latch member on the release member, and a latch engageable with the support; and the latch assembly is movable toward and away from the support location to engage and disengage the support; characterized in that the body further comprises: a first wall extending along said bottom surface; a first recess in said first wall; a retention member adjacent the support location; the release member extends along the first wall and comprises a first projection on a side of the release member adjacent the first wall; the release member having an assembly position away from the support location with said first projection physically engaging the first wall adjacent the first recess to prevent movement of the release member along the surface and permit mounting of the latch member on the release member by engagement between said first (60, 62) and second attachment members; and the latch assembly having an operative position where the release member is closer to the support location than when in the assembly position, the first projection is in said first recess, and a portion of the latch member engages the retention member to secure the latch member on the base. a first wall extending along said bottom surface; a first recess in said first wall; a retention member adjacent the support location; the release member extends along the first wall and comprises a first projection on a side of the release member adjacent the first wall; the release member having an assembly position away from the support location with said first projection physically engaging the first wall adjacent the first recess to prevent movement of the release member along the surface and permit mounting of the latch member on the release member by engagement between said first (60, 62) and second attachment members; and the latch assembly having an operative position where the release member is closer to the support location than when in the assembly position, the first projection is in said first recess, and a portion of the latch member engages the retention member to secure the latch member on the base.