The fuse box is right next to the drivers side hood hinge. Check the owners manual for the correct fuse #. Pull the spoiler motors fuse and split it down the middle, then break off all the remaining plastic. At the top of each prong there is a small hole where you can fasten the wire. (I used an ordinary flat 2 prong extension cord.) Re-install each prong into its receptacle.
Install an "in-line" glass same amp fuse into the wire to make up for the fuse that you disabled.
There is an access port to the interior "behind" the battery that's plugged with a rubber grommet.
I currently have mine temporarily hooked up to a simple hand held on/off button switch, that I use to activate the spoiler only when I want it to go up.
I eventually plan on installing an old fashion floor mounted "dimmer switch" to take the place of my current hand held unit.
Of course the spoiler will stay up until you slow down to the proper speed, but you can then turn it back off, and it won't go back up until you tell it to.
If you forget to put the spoiler up when you're travelling too fast, an audible alarm will sound at around 90mph just to remind ya.
I love it.