I've installed a set of skull powerfold mirrors last week. As I could not fit the loom ( my car is LHD and the loom was RHD) I removed the orange wires with the plugs from the loom and installed in the door loom of my 75. I started with the driver side as it's easy to install and get a test to see if is actually working once you have the new switch cluster with power fold mirrors button.
You can see in
this video.
Btw I did not remove the doors in order to fully installed the wires.