[JohnnieB]

You can use a DPDT/Center Off (such as the CC type) without a diode.

Using the terminal numbers on the attached diagram.

Jumper (hard wire) 3 to 4.

Jumper (hard wire) 1 to 5

Connect Red/Orange wire from Run/Tow switch and Red wire to Pin-9 on controller to 3 & 4

Connect Yellow wire to keyswitch to either 1 or 5

If terminal the Common contact closes with 2 when in R, connect Orange wire to Pin-4 on controller to 2.

Note, the Common contact typically closes with the terminal under the opposite end of the switch from the side the toggle leans toward. It is best to check with Ohmmeter to be sure.