Help with wire identification.

[Cmillet]

All 3 of these wires are on the passenger side. The green wire and the black wire comes out of the same little cluster. The black one has a plug still on the end. The yellow wire comes out of the same little cluster as the starter wire. It also looks like a wire may have broke off of the starter. (Truck still starts fine)
Also their is some kind of sending unit in the block without a wire. Thanks for your help.