Hi amp alternator

[Ragtopman]

Hi all, I just purchased a new hi amp (120) alternator off the dreaded E-bay and it came with directions that are a bit unclear. The directions state I need 4ga. wiring for it to work. Which wires do I need to switch. This is a direct bolt in alternator and looks just like the one in there. Does anyone have the step by step for this. The jeep is a 91 YJ 4.0l

 

[jay79cj7]

It should just be the main wire going from the alternator to the solenoid (that in turn leads back to the battery).