need wiring help for T5 light fixtures

I found four T5 6 watt lights with fixtures. They were connected to old GE ballasts with two black wires coming out of each ballast. There were two switches connected one switch with 6 wires and the other with the capability of having 8 wires but only using six. These were all connected to a plug with a white and black wire. I have a very very basic understanding of electrical things but want to try to replace the old wiring, whoever did it did a shoddy job. Does anyone have a wiring diagram for something like this, and also I'm a bit confused on wiring the ballasts because of the two black wires, I can't tell which is negative and which is positive. I also have a simple drawing of how it is currently wired and can send it if it would make it easier to understand. Thanks I appreciate any help.