A locking socket includes a shell and a buckle mechanism. The access apparatus has an arm turned, and a mounting fixture that can move along the arm and having a holding member. The holder assembly and harness head are configured with a means for snap-fit assembly that provides space to mechanically connect corresponding sensor terminals and harness terminals with each other forming a resultant subassembly for insertion into a sensor housing. The panel connectors include a base and a member extending generally transversely from the base.