Where to find this harness connector?

I rewired all but 4 or 5 wires in the car. I got rid of those firewall connectors and ran it all into a box with terminal strips. The box has be modified some but mostly correct


I bought about 1200 feet of 16 gauge wire, mixed colors and built the harness in place. Of the 1200 feet, I must have 700 feet left. But I like to have inventory available.
I bought 50 ft or so of 12 and 14 gauge wire also.

I did the wires one at a time and was able to get it done. My wiring schematics helped quite a bit in locating the other end of the wires.

If I was to give advice, it would be, There is no such thing as a solderless connector. I crimped and soldered every single wire at both ends. Belts and Suspenders.