Well there’s some insight into the hall effect sensors.
Sensor bent throu’ 90 degrees to vertical and ‘prune’ off the circuit board ears.
The mounting is magnets but sadlt the screws sit proud so the boards tend to rotate when wires get moved. 2mm screws ordered . . .
The plan is to supply the OV via the chassis thus freeing up the wire to be used for the digital output. It’s becoming a bit of a rats nest at the moment but re orientating the Power distribution should resolve some of this. . .
I need to make a connection between the mounting hole and the OV connector which could well be a little bit fiddly . . .