Thank you everyone for your responses.
@Spot - The diagram you drew matched what I had, with the only minor addition of D leading to the Starter relay (which is wired to the Starter Solenoid, which is wired to the Starter Motor). The alternator is a Lucas LXA119
@Wotname - hahaha ,,, I had to look up 'IMO'. And yes, there is a fuse between A and I. The wires from the battery
are Guage 0 which the Salesman convinced me was the way to go (I found out later that, this approach was likely an overkill), otherwise most of the wiring to the Switch panel or instruments are primarily 15A to 20A rated.
@HeinSdL - Sorry, yes ... my reference to the fuel pre-heat is indeed the glow plugs.
Thank you again for your input, it has placed my mind at ease with this aspect of the project