"[b:654c4848f0][i:654c4848f0]<font color="#6699ff">Any other info would be great too.[/i:654c4848f0][/b:654c4848f0]</font>"
The 12 volt conversion for the M/MT will be very similar to the 12 volt conversion for the Model 40.
The 12 volt battery will be [b:654c4848f0]NEGATIVE[/b:654c4848f0] ground.
Take a look at the photo below of the starting motor switch on "BW" our 54 Model 40T.
The "hot" wire from the starting motor switch is connected to the [b:654c4848f0]NEGATIVE[/b:654c4848f0] terminal post on the ammeter.
Take a look at the photo below of the ammeter and ignition switch.
Note the "hot" wire from the starting motor switch to the ammeter shares the same post as the "hot" wire to the ignition switch.
The [b:654c4848f0]POSITIVE[/b:654c4848f0] post on the ammeter is connected to the BAT post on the alternator.
Take a look at the photos below of the alternator.
Either a warning light or diode should be installed in the wiring from the ignition switch to the 1 terminal on the alternator.
Take a look at the photo below of the warning light.
The photos above display the correct wiring for the alternator.
You need to determine the type of 12V coil is to be installed on your M/MT.
One type of 12V coil requires an external resistor.
Take a look at the photos below of the ballast resistor.
The photo below displays the coil.
Hope this helps.