please help me

please can some1 help me,
i have brought a 7" flip out screen (is not moterrized) and there are 4 wires and 2 in slots i have a vauxhall corsa ( p reg)
and i can not wire this screen up :(
it has 4 wires
a yellow wire which goes to the positive on the battery
a black wire which goes to negitive on the battery
a blue wire which goes to the back up light
and a red wire which goes to the ACC
i do not understand the blue and red wire i do not no what the ACC is so i do not no were to connet the red wire, and i do not no what the back up light is so i can not connet the blue wire :(
please can some1 help me asap
add me on msn my addy is [email protected]
many thanks
Mike

ACC goes to a circuit that's only hot when the key is turned to the ACC position. There's always one by the stereo. Get yourself a voltage tester and figure out which wire comes alive when you turn the key. If you find it, that's the one you wanna connect to.

some asked this before, the backup is for hooking up a backup camera