Rocky1

This is what I use and it seems to work great. It has a vinyl cover and a quilted insulated material behind it. Several straps behind with clips and bungees hold it tight. I have hauled it about 500 miles and it stays put very well !!

I don't have the factory radio but I have a Rockford Fosgate PMX3 and I put an antenna on the roof and run it folded down to avoid it getting swiped off by a low hanging branch.

Works great !

The bus bar is toward the middle just about directly behind the vacant switch hole farthest to the right on the dash. I had a tough time finding mine as well. I have a 2020 Max Limited.

Hope that helps

Love the look but I was wondering if you had to use any wheel spacers on the rear.

Just finished putting mine on my 2020 Max. Install wasn't' to bad except for the right  side due to the fuel tank being in the way. I had to undo the fuel tank and slide it over to be able to reach down to put the bolt in on the rear support. You definitely need some help to install them. I think they are pretty sturdy and my hope is that they will avoid the very thing you mention.