Several users have added auxiliary power circuits that are switched on with the key instead of on all the time. I was inspired particularly by DonShockley and MMontMiny, This is how I did it.
This assembly was made first. The relay will power the line side of three fuses, the load side of each will be routed to the Upper console, Lower console and Rear of the van.
The relay is triggered by the PAM circuit (R37 under the hood), an option not installed in my van, but it becomes hot in the Run (II) and Start (III) positions.
Both the Power to the relay and the switch leg have inline fuses. I had planed to us a Tap-A-Fuse but it wouldn't fit properly. Both the wires run along the firewall to the passenger side of the van and through the grommet to below the dash behind the glovebox near the BCM. The third inline fuse seen in the photo is for trailer lights.
Everything under the dash gets tucked away behind existing wiring. The coil of wire in the upper left of the photo is for future use in the lower console. Neither the Lower console or the Rear circuit will have fuses installed at this time.
From under the dash two of the power circuits run up to the A pillar. One runs up the outside of the pillar and above the headliner to the hole near the rear view mirror. The other runs inside the A pillar to the top channel and to the rear of the van to be used at a later time.
I used an existing fastener to ground the relay.
This power socket is temporary, ultimately a socket will be mounted in the box part of the overhead console. Grounding is done at an existing threaded hole.
With the shelf reinstalled this was the first objective. When I turn on the van my radar detector is powered up. A Dash cam will probably come soon, maybe front and rear.
Special thanks to DonShockley for helping to source parts and wire.