A brake actuator comprising: a carrier having a centerline, an outer peripheral wall, and a radial slot in the outer peripheral wall; and an electromechanical actuator mounted in the slot and including: a housing having a first side and a second side, the second side including an opening; an electric motor supported by the housing; and a ram mounted in the housing and operatively connected to the electric motor for linear movement in a direction parallel to the centerline of the carrier, wherein the ram moves through the opening, the housing comprising a first portion at the first side having a first width and a second portion at the second side having a second width greater than the first width and a transition wall connecting the first portion to the second portion, the first portion passing through the slot and the transition wall engaging the carrier and substantially preventing the second portion from moving axially toward the carrier, characterised in that the carrier includes a first electrical connector and the electromechanical actuator includes a second electrical connector complimentary to the first electrical connector, the second electrical connector electrically contacting the first electrical connector when the electromechanical actuator is inserted radially into the slot. a carrier having a centerline, an outer peripheral wall, and a radial slot in the outer peripheral wall; and an electromechanical actuator mounted in the slot and including: a housing having a first side and a second side, the second side including an opening; an electric motor supported by the housing; and a ram mounted in the housing and operatively connected to the electric motor for linear movement in a direction parallel to the centerline of the carrier, wherein the ram moves through the opening, the housing comprising a first portion at the first side having a first width and a second portion at the second side having a second width greater than the first width and a transition wall connecting the first portion to the second portion, the first portion passing through the slot and the transition wall engaging the carrier and substantially preventing the second portion from moving axially toward the carrier, characterised in that the carrier includes a first electrical connector and the electromechanical actuator includes a second electrical connector complimentary to the first electrical connector, the second electrical connector electrically contacting the first electrical connector when the electromechanical actuator is inserted radially into the slot. a housing having a first side and a second side, the second side including an opening; an electric motor supported by the housing; and a ram mounted in the housing and operatively connected to the electric motor for linear movement in a direction parallel to the centerline of the carrier, wherein the ram moves through the opening, the housing comprising a first portion at the first side having a first width and a second portion at the second side having a second width greater than the first width and a transition wall connecting the first portion to the second portion, the first portion passing through the slot and the transition wall engaging the carrier and substantially preventing the second portion from moving axially toward the carrier, the carrier includes a first electrical connector and the electromechanical actuator includes a second electrical connector complimentary to the first electrical connector, the second electrical connector electrically contacting the first electrical connector when the electromechanical actuator is inserted radially into the slot.