The wire colors you provided don't check out with any available diagrams.
But this may help.
Referring to the posted diagram;
A black wire is indicated. This is ground. It may be the motor housing or a separate black wire.
The red/yellow wire is high speed.
The Brn/white wire is low speed.
The remaining wires and symbols are the park switch etc. that won't be used.
You only need to connect the wires leading to the motor.
Using a single pole, double throw, center off toggle switch connect the center (common) terminal of the switch to 12 volt + fused.
Connect the red/yellow wire to one of the remaining terminals.
Connect the brn/white wire to the other terminal.