See attached pic.

I got the idea from my flying career days. Early fuel switches had no override for the off position, and many pilots died by accidentally turning the fuel switch off without realizing it, so the aviation industry added a simple override for the off switch. One would think the marine industry would have followed suit.

Note how the lower screw head prevents the override from vibrating out of position.

Simple gravity and screw friction holds it in position, if you are in bouncy seas.

It is important to chafe-protect the point of the screw from behind, since there are LOTS of wires in that area...or thru-bolt it instead.

I keep the switch connections well lubed with Corrosion Block to prevent the "loss of contact" issue.

Personally, I like being able to charge either bank 1, bank 2 or both from the alternator.