What's the Wire from fuse box to starter called
 

I have a 98 dodge ram 1500 5.2 liter and I'm looking to find out what the wire is that goes from the fuse box to the small stud on the starter.

That wire activates the solenoid, and comes from the ignition switch.

I have a problem
 

That's the small wire that plugs in correct

You can look up the wiring in the service manual here.

This shows the