Installing Remote Sport Mirror - 73 Duster

Hi Guys, I am back again looking for guidance. I am in the process of installing original Sport Mirrors on my 1973 Duster. I have the door panel off and I can see several issues and thought I had better ask people that know, before inventing new swear words on my own.
First, to get to the inside nut that holds the mirror it looks pretty close. Will I have to remove the window to get up in there?
Second, When the window travels up and down it contacts the adjusting cable for the mirror. I have (2) clips that apparently are meant to move the cable out of the way. One clip is plastic (designed to snap into a hole - somewhere) the other is a folded spring steel that would clip on to sheet metal. The problem is that I am not sure where these should go for best results. Can you give me any help?