Stop in for a cup of coffee

Was gonna ask on the b-body forum but you guys would know.. is there nothing that holds the engine harness to the bulkhead? mine just seems to push on and that's it... I'm using my original '62 harness as it isn't cracking or dried out at all (wire insulation)
Push in, there’s metal wire clips that hold them in on those years, in 64/65 they started going to plastic clips built in to the harness but they were inconsistent with that