Wiring a radar detector

[asshanson]

Just got the Escort Passport 8500 x50 and all I have to power it is the stupid stretchy phone cord that plugs into the cigarette lighter. It's a huge annoyance when shifting, not to mention it's ugly hanging down like that. So, I want to direct wire it into one of the wires that provides power when the ignition is on, like the same wire my stereo is hooked up to. However, Escort decided to be tricky and use a phone plug for their power/controls.

I know there is a "direct wire smart cord" that Escort sells, but I don't really want to spend $30 on something that is as simple as a phone plug. My question is, which wires from the phone plug provide the power? There are the full 8 wires on the unit's phone jack, but there are only 4 on my current plug. So I guess that means it has to be one of those 4.

Has anyone done this before or know which wires I need to hook up? I searched, but couldn't find anything on the web. Any help would be appreciated. I'll be at the two events this weekend, if I find out which ones it is I'll probably just hook it up there. Now to find a black phone cord that I can cut apart.......