John Deere R72 lawn tractor - wiring issue

[spr]

I am working on a JD R72 rider. The engine shuts off when you turn the blades on, so I am wondering how I go about disabling the safety switch? I have already cut off the switch, and now there are two purple wires, a white wire and a black one. You would think that you would just connect them to one another to complete the circuit, but I think I have tried every possible combination, and the starter still does nothing. Anyone know how to bypass this switch? Thank you