New to retrofit t5s... Some dumb questions

[c_scherer123]

I have never used a retrofit kit for lighting, never seen one either. I have a 2 bulb T5 Icecap kit (it just came in the mail, with no instructions, and I was a bit shy on time to really look it over).
I have a very basic idea about hooking it up. But if someone could go over it I'd be grateful.
I can attach the lights directly to the top of my canopy.

But where do people normally hide the ballasts? Mine came with 8 feet of wire, so I am not too sure how far away it should be.

How do you hide your wiring (within hood and going to the plug in)?

Grounding for the ballasts? How does that work?

How far apart do you normally put your bulbs?

Sorry for all of the dumb questions. I tried a number of searches but I can't quite seem to find the answers.
Thanks in advance!