62 Dodge D500 New Starter Wiring

Greetings,

Me and a friend are working on a Dodge D500 Grain Truck that was exposed to some pretty nasty flooding that wiped out the starter (everything else has been repaired and replaced or checked and is good to go). So we got a new Starter for it, Only Problem is, the New Starter has the Solenoid on the starter itself and has two wires (one to the Solenoid, one to the starter) to hook up on it where as the old Starter only had one wire going to it. We need to figure out how to wire up this new starter. For the Starting Circuit on this truck we have a Starter, Battery, Firewall Mounted Starter solenoid (the round "magnetic" switch with 2 posts on each side, and 2 posts on the front) and what looks like a Starter relay next to that Starter Solenoid that has a couple wires hooked up to it, and the ignition switch.

Does anyone know how to Wire up this two wire starter versus the original one wire starter as the starter instruction sheet does not cover this???????

Thanks in advance to any help you all can give me.