I thought about it a little more and I actually used the positive cable from a truck, but I think Ford wired trucks and explorers the same when it comes to starter. The large red cable is pretty self explanatory.....one end to battery +, other end to starter(lug and spade), in the middle is the fork connection which attaches to both sides of the solenoid.
In your Bronco harness should be a red/blue stripe....that is the trigger wire for the solenoid coming from the key switch....it goes on the small(1/8") post on the solenoid. For the alternator, I tied the main charge wire to the big solenoid post. The small wire coming from the alternator ties to the green/red stripe wire in the Bronco harness. The small yellow wire in the Alt harness is not used if I remember correctly.
I think about covers it. Do you also have the negative batt cable? I used one of those too because it has multiple lugs to ground the battery, the frame, and the engine.