I'm planning on connecting a mini-split condenser to an unused 30 amp outlet I have outdoors. My plan was to add a 30 amp fused disconnect. How do I go about handling the outdoor gang box? Would I just cover it with a plate that has a knockout and make a connection from that to the disconnect? Can i Just have the conductors come through the back of the disconnect and use that disconnect box as a cover for the old gang box?