How to Drill Doors and Jambs for Loom Install?

[jsera]

Hey guys,
I amadding power windows and locks to my 72 and need to drill the door and jamb to install the loom. I bought the electriclife s shaped loom with the accordion middle section.

I know the door has a double wall. I plan to drill from the inside as the door is currently installed and I would prefer not to have to remove it.

As for the jamb, it seems like there’s a double wall there too? I reached my hand in through the vent door and it seemed that way at least. Do i drill through both here too? I plan on adding the door jamb switches too, would the wires for this drop down between the walls and need to be passed through with the wires from the loom?
Any suggestions and pictures would be appreciated!