[plee911]

If you have the black and red connected you have an AC system.
The grounds get put all over the place in different places on different buggies, I have even seen them in different places on identical buggies so no there is no specific spot that are common.
The only thing that is common is them getting dirty even when they may not look like they are and losing connection and there being to few of them on almost every buggy made.
Like i said check ALL of your connectors pull them apart inspect/clean them and put them back together. Disconnect your ground and clean them and the mounting points with a wire brush. Dont be afraid to add some additional grounds. Most ground connectors are aluminum or some times copper and your frame is steel. when dissimilar metals are placed in contact with each other it causes a chemical reaction that speeds up tarnish and build up. Add to it that china stuff is not the highest quality and presto you get the wiing issues these buggies are known for. They can be mitigated by inspecting the connectors and grounds regularly and cleaning them.