Winter is Coming
Time to think about winterizing your Bolt.
A good Tech Tip WINTERIZING YOUR TRUCK including a link back to the Forums for additional tips.
I ran a aux fuse block but grabed power off the ignition. ...fuse pic...(looks messy but cleaned up now). I can change it over and wire as you describe.
That Napa block is the same one Im have. Didnt know Napa carried them.