ballast

Hey all, Soon i will be installing HID lights in my projectors and am just wondering where is the best place to mount those balky ballasts on a VE? in my case i need to mount 4 of them. Oh and what are people using to hold them in place?

Was washing some oil spilt from changing my oil today and i had the engine running as intended to just give it a quick hit under the oil filter and i splashed i little bit of degreaser on my coil and the engine instantly stopped, never had a problem with coils getting wet and failing before. So...