Swapping pedals wiring question

[NJ C10 Guy]

I am swapping out my manual brake, hydraulic clutch pedal assembly for an automatic brake assembly with vacuum assisted brakes. I can see between the two assemblies there are differences in the wiring connections. For instance, the brake switch on the manual has 2 prongs, the brake switch on the automatic has (2) sets of 2-prong switches. I think one of those is brake the other is cruise control? The other connections that bolt up next to the brake pedal are different as well. The manual one has (3) separate connections, the automatic has a black plastic box and beneath it there is a 2-prong and a 3-prong connection, but it looks like the wiring harness in my truck doesn't have anything that will connect to these.

I can snap some side-by-sides later and post them unless someone knows what I'm talking about beforehand and can help me out before I bolt everything up. Thanks in advance.

Side note: My reverse lights are on a toggle switch in my ashtray if one of those would be for the reverse lights for some reason.