rubber nubs are for wires going in from silonoid to motor

one could be a drain hole boot IIRC,but seems they were insolation for the internal wires

I would have to go look at mine on the shelf again

yes,remove the plastic adapter piece that is on it and then hook up the batt and silonoid wires

you will like lifting the 6LBS starter way more than the 32LBS old style starter for sure