Got half of it solved, but the wire-color callouts on the DSM cd don't exactly match what I have.
For the LO relay it calls for a GY and B for activation and LB and L for the switched side.
For the HI relay it calls for LR and LR for the activation side and LB and B for the switched side.
The wiring for LO all seems to make sense. I have a Green Yellow wire and a Black wire, as well as a Blue Black wire and Blue wire, so those are connected correctly.
The HI doesn't match up. I only have one Blue Red wire, and 2 Blue Black wires plus the Black wire. One of the Blue Black wires is a smaller gage than the rest of the wires.
Anyone have any ideas which one goes where on the HI relay?