A good place to start is with an Elmer. Short of that a screwdriver is worth considering. https://www.tarheelantennas.com/mobile_antennas has good pointers on placement.
Grounding straps and filters will be your best friends. Tuning is a must. On the lower bands you will just warm the coil...
I have no idea, but coincidentally they are in exactly the right location, size and shape to secure the rear glass power and fluid line connectors when I take the top off the rig.
I had a similar problem when I woke up Sunday. Time on my iPhone and computer were off by an hour from the clocks on the microwave and stove. I have no idea whats going on.
[Opinion:] It's not "If you should" it's "How long should you". [End of Opinion]
You do you.
For those that want help doing their own research, here's a Starting Point
-Guess-
"Brake controllers send a small amount of voltage along the brake output wire, if a trailer is connected, the magnets in the brake assemblies [OR your "Backlight"] will create a power draw. This power draw tells the controller that a trailer is connected."
If you have a power draw off...