If you removed the second PTO switch, there will be a connector behind the steering pedestal with nothing attached to it. If the 430 is the similar to the 332 back there, then there will be a bunch of purple wires and this connector. The connector in question will need to be looped back to itself. This closes the circuit in place of the secondary PTO switch "on/off" position. The purpose is to allow the Time Delay Control Module (TDCM) to shut the engine down if you get off the seat if the PTO is on. It also doesn't allow you to crank the engine over if the PTO is on. Without the jumper, the TDCM "thinks" that you have the rear PTO switched on all the time.