starter wiring question

[Biohazard]

i just have a quick question. i have a 1994 ford ranger with the 2.3 5 speed
i replaced my starter recently and the wires to the starter are corroded like i couldnt believe. so i was hoping to run some new one.
i know that the larger wire goes the the starter solenoid but im not sure about the other. im pretty sure it just grounds out some were, but i want to be 100% before i just go ahead and do it.
im pretty sure that what it is tho.

 

[Nater]

No..It goes to the spade connector on the back of the starter....