Rectifier regulator help please
 

The small 4 pin was on the buggy, the 5 wire one came with the gy6 motor from amazon, and the 4 wire one i ordered but doesnt have the correct plug for the harness. Now i just want to make one if these work but i want to make sure i dont fry anything. So can someone tell me what the pink wire goes to thanks guys

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You will need to know if that engines ignition is set up for AC or DC volts.

How do I check that

The people you purchased it from should know. The old rule of thumb was ac volt cdi's were smaller and used 2 wires on the 2 pin side dc volt were larger and used only one wire on the 2 pin side of cdi., however that is no longer the case.

Thank u

Another quick (not always prefect) is see if your headlights turn on with the buggy off. That is "usually" a DC system

All buggy's work off of DC volts, starter, horn lights. The stater like an automotive alternator produces AC voltage. The voltage put out by the stater supplies current to the volt regulator/rectifier which in turn changes it to DC voltage. So if your lights come on with the ign switch off they are just wired directly off the battery voltage just as your cars lights turn on with the car off. On the older buggies the AC side supplies the CDI so you are considered to have an AC volt ignition system which its trigger system runs directly off the stater before the regulator/rectifier. Later buggies to date all use the DC ignition system for the trigger signal to the CDI thus making it a DC volt ignition system.

Thank you i needed that

Good description sycarms.