the easy answer answer is that they don't need to be wired up. Will work fine without it

* To make the back-up lights work, wire up the Reverse switch
* To enable clean-air operation, wire up the Top Gear switch -- if your B310 used one in the first place

Reverse Lamp Switch has the two Green wires (Green = Lighting System). The harness in your photo looks like a Red and Green wire. Connect these to your B310's automatic transmission harness same color wires. i cant remember if its in the tunnel or in the shifter box

Top Gear switch has two Yellow wires. Which B310 do you have? FED, CAL or CAN model? A12A, A14 or A15 model? Post a pic of your aluminum underhood ID plate

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