If you Look at the fuse box with a flashlight you will see that there is some spots empty and labeled acc. you just put a female spade connector on your wire and plug it in there it will have power when the key is turned on. I belive there are also some labeled power (or something) they have power all the time.
P.S. also remember to put a fuse in all of the power wires leading to (or from the fuse box)