Ok ; just goes to show I should never trust anything to memory .
No multiple connector on the R mirror wiring , but the Ramco wiring does pass through the firewall where its connected to the Newmar wiring that crosses behind the dash, with bullet connectors.
First picture ( yellow arrows are the lower mirror mount screws) wiring disappears into spray foam insulation.
Second picture , grey tube ( yellow arrow ) is the Ramco wiring coming through into the interior , I was laying on my back on the step cover and couldn't get a better angle, other wires ( red arrow ) are Newmar from the control switch ( s).
Dash vent duct above .
Third picture connectors ; I didn't realize till I loaded this to my computer how close I got . If you need wire color info , let me know and I'll take another that details the hook up.