@Goboatingnow
I like the idea to use a small relay powered by SLA to invert the switch logic.
but this would likely result in:
NORMAL - Normal LFP Operation - relay coil is disconnected - NOT GOOD the BMS needs to operate normally)
Position 1 - LFP Bypass - relay coil wire is disconnected - GOOD
Position 2 - SLA Emergency Backup - relay coil wire is disconnected - GOOD
OFF & LFP Disconnect- relay coil wire is connected - NOT GOOD we need to over-ride the BMS)
We still have to sort a couple of things, perhaps it is as simple as making a new contactor plate that, connects in the right quadrants?
I should try to take apart my switch on the boat.