The Molex 1510340014 is the 4-circuit receptacle housing in the EXTreme Guardian 151034 series. It's a free-hanging (in-line) power interconnect rated 80 A per circuit on a single row at 0.433" (11.00 mm) pitch. The latch lock holds the pair mated without tools, which is handy when you're re-pinning a harness on site.
80 A per circuit — what that means for the build
Rated 80 A per circuit at 11.00 mm pitch.
Mating and termination — what crosses into the harness you've got
This receptacle mates with the EXTreme Guardian male header (the plug half with blade terminals). The latch lock engages audibly and holds under vibration — no secondary screw lock needed. Termination is crimp, so you can re-pin it on site with the correct tooling.