D47U Direct Electric Start Battey Cables

Is this for an original inertia drive direct start (remote solenoid) or a conversion (with direct mount solenoid)?

Old Magnet-This is a factory installed direct electric start unit with glow plugs. The batteries mount crossways behind the engine, where the pony motor would have been. Yes is has the remote mounted solenoid. The starter has two posts. One on the front cover of the starter for the gound and the other on top of the starter barrel near the nose cone.

Here is a wiring diagram for the original direct start. Yes the batteries will need to be connected in series for 24v. If you have a master disconnect switch it is used to interrupt the ground lead.

Old Magnet- Thanks for the wiring Diagram. I quess the other question I need answered is whether this is a positive ground or negative ground. The master disconnect is on the ground side. The diagram shows the positive cable going to the mag switch and then to the end of the starter housing which would put it to ground. But maybe the diagram is not showing specific arrangement of my starter. I see the diagram is showing ground symbol on the negitive cable, so I would assume it is negative ground, but wanted to ask for sure.