I'm going to hardwire both cars - Honda Pilot and VW Golf. The Honda is going to be easy, I'll wire it up to the overhead console.
The Golf is the challenge. I got the wire looped thru the overhead liner, A pillar and down between the dashboard panel and A pillar. Right now the end is dangling by the hood lever.
The fuse box is right by the door (access with driver door open, fuse box on the side of dashboard).
If I go the fuse box route, it will always have power. Risk is that I may leave it on. However, I don't leave RDs on the windshield so it's minimum. I suppose I can add a switch to the wire and make it switched.
Or I can tap into a wire that gets juice with ignition. I tried to get under the dash, after struggling with it I got the dash bottom off (it isn't open as I've found in my previous Japanese cars). To my dismay, all wires were nicely zip tied and all and way up (I need rubber hands to reach there). I'll have to take this to an auto store, CC, BB, etc. Don't mind a reasonable charge as long as nothing is broken. Also, in this car the radio is ignition swiched at start up. When the car is turned off, the radio stays on until the key is removed.
Another option is to wire it to the map lights near the RVM. But these always have power.
What would you suggest/recommend?