Where is remote mirror control located?

I just did mine on a 67 barracuda and I didnt take pics because the battery was not charged. I used a step bit for the initial whole then a dremel tool. The bottom of the whole is flat and the top has a key way on mine. After the whole was wide enough I took a flat file to make the bottom. Then filed upward for the top key way. Then I put some cheap grinding stones that I bought at harbor freight on the Dremel tool and finished the the top key way. the flat part of the whole is at an angle. I took a piece of 3 inch masking tape and laid it over the old whole to make a stencil.I put the measurements on the door. Put the tape down(Stencil) and then covered outside the whole in stencil with blue tape. It took a while but looks factory.I can give u pics of old door w measurements just pm me.