Your information is very cryptic to understand, but the concept of wiring 3 flourescent or any other quality of light fixture is the same, the only difference for flourescent fixtures is you couldn't put them on a standard dimmer, wiring these or any other lighting fixture in series is the same.
Is there no switch?
It is impossible from your post to know what you are wiring to what, saying wires coming from the end of the fixture doesn't mean much.
You need to simply wire black wire to black wire, white wire to white wire, neutral to neutral.
see the attached diagram, (I left out the neutral for ease of making the diagram)