Ok so the 6505+ combo coming out has an enternal speaker output, all I would need to do is hook up a cab to it? or would I need to remove wires in the combo
just a cable, yes
You should just be able to hook it up to the cab.
yes yes yes. you'll be fine just hooking it up. some amps disable the internal speaker when an external is connected, but i don't think that's the case for the 6505.