Abstract: An apparatus is provided for locking first and second adjacent electrical connector modules which are stacked end-to-end. The first and second modules each are formed to include an insulative housing surrounding a plurality of contacts and coding slots formed in a wall of the housing. The apparatus comprises a locking key having a plurality of spaced apart tabs configured to engage a plurality of coding slots in the first and second modules when the first and second modules are stacked end-to-end.

Abstract: An apparatus is provided for locking first and second adjacent electrical connector modules which are stacked end-to-end. The first and second modules each are formed to include an insulative housing, a plurality of windows in communication with a plurality of contacts coupled to the housing, and a foot section formed to include a coding slot. The contacts have contact terminals extending beyond a rear wall of the housing in a plurality of rows. The apparatus includes a cap having an insulative body including a plurality of spaced apart divider walls configured to define a plurality of slots, each slot being configured to receive a row of the contact terminals. The insulative body of the cap extends across abutting ends of the first and second connector modules. The apparatus also includes a locking clip configured to engage adjacent abutting foot sections of the first and second connector modules to lock the abutting foot sections together.