The panel mount dimensions are such that mounting interchangeability is possible with MIL-C-5015 connector sizes (see Compatibility table)
The plugsmAy be front or rear mounted, with amAximum of 4mm panel thickness
Contacts are rear insert, and are held in place by the shells locking retention plate, they are available seperately, typically 220-2810 (1mm dia and 20AWG) or 175-3963 (1.6mm dia and 16 AWG)
Sealing gaskets should be purchased separately typically 175-3985.