Need some help with wiring ID

[Lattimer]

I'm working through all of the messed up wiring under the dash in my 1970 Chevy. I found 2 unhooked plugs under the dash, and both are melted/broken. One appears to go to a relay on the inside of the firewall, and the other is just hanging there with nothing to hook to.

My best guess is one is for the horn and one is for the back up lights, since neither work on the truck. Not sure which is which. Truck used to be a 3 OTT, and was converted to floor shift. Its soon getting a 4-speed.

This one is a 2-wire light green and dark green

This one is a 3-wire that looks like it went to the relay. Plug is melted. Red, green and black wires

Relay



Any help is greatly appreciated!