Bulkhead wire size

nothingbutdarts said
I am looking to pull them both out of the plastic connector without damaging the wire or the terminal end

and more here

nothingbutdarts said
the other 10 gauge power wire feed have what looks like extra rubber/insulation going into the plastic connector.

Critical terminals got the rubber seal. The downside is not as easy to disapate heat.
Not many 10 ga wires used besides battery to starter relay. Late models may have had 10 ga on the alternator output to main splice (R6). Special options excepted.