Also take a picture of the battery compartment,
Measure the open area of the tray.
If it’s as long as the tray in my 2010 EL truck, may be able to hook you up.
Is there a HP/KW tag on the stock motor.
I’ll invite Rodney. He will know the gear ratio etc.
https://community.electricforum.com/t/2007-e6-battery-wiring-layout/6313/4