For the time being (until you say otherwise) I'll assume it's a modern internally regulated alternator you're going to be using. If that's the case, then you don't really re-use any of the old alternator harness as it will only confuse things and also be under-sized for the new higher output alternator.
So look up any of the many 3G conversion discussions here and you'll get a mess of instructions and advice. But just to add some details here, you basically want a larger gauge main BAT output wire and will run it directly to the battery positive, or positive side of the starter relay/solenoid on the fender. Best practice is to fuse it as well for protection.
Here is the one we sell for 3G conversions:
https://www.wildhorses4x4.com/product/Battery_Charge_Cable_AMG_fused/Bronco_Starters
It utilizes a 6ga battery cable style conductor to handle the higher rated units, including the 130a factory style and even higher output versions.
This is the same size that Ford themselves has been using since the introduction of the 3G in 90 and 130 amp models. On some with longer runs, such as vans, or higher loads such as diesel pickup trucks, they use the larger 4ga size cable instead.
So you can make your own, or as you can see you can buy them pre-made as well. Because it's a custom retrofit, it does not matter what year your Bronco is. You're using this to replace your original harness.
Is this what you're contemplating?
Paul