[Gorp]

was just wondering has anyone loosen the positive terminal screw that links up the the fuses? the one with a female nut that screws onto a screw of the housing that links to the fuses? ive tried to loosen it be no luck, im trying to switch to a aftermarket battery terminal.

Yes, and it's on there TIGHT.
Disconnect the negative post first to avoid any short circuits.
I broke the nut loose on mine by using two breaker bars on both nuts on the top of the "fuzed link"
One broke loose, but in order to get the other off, I needed to use a vice grip to clamp the plate where the first connecter was.