location of control for left mirror

I am working on my '70 Duster and want to install the remote control for my left side view mirror. Can someone please take measurements of it's proper location. I believe the hole should be 7/8". Thankyou!

View attachment May102014mothersdayduster 051.jpg
Don't pay any attention to the present hole that the remote and cables are poking through. If you can reference the location from the "Duster" emblem for the correct location that would be awesome!