An apparatus and associated method characterized by an enclosure having a side member (102) that defines a substantially orthogonally directed cavity (114) penetrating the side member. A motor shaft (108) in the enclosure has a distal end that is operably aligned with the cavity. A shear transfer member (120) in the enclosure is operably affixed to the motor shaft. One of the shaft and the shear transfer member is sized for a close mating engagement with the side member in the cavity, and the shear transfer member is further sized for being simultaneously shear coupled to the side member.