Cruise Control vacuum line routing......
 

The hose to comes off the T by the master cylinder and goes through the firewall............... what does that connect too? I couldn't find it in the Rave manual.

brake switch
 

I assume you have an auto transmission...

It is in RAVE just hard to find I guess. That line goes through the bulkhead to a switch located near the top of your brake pedal arm. When the brake is depressed it opens the air line, removing the vacuum from the lines and causes the Cruise Control to let go of the Throttle. If you are limber just crawl into your footwell (on your back) and look up. You will be able to see where it passes through the firewall and then to the switch.

Thanks mine has never been connected since I had it. I figured the brake pedal but wanted to be sure before I crawled under there. I'm 6' 1", 220 lbs with long arms so its not the easiest thing to do but doable. Thanks.

Oh, a little guy... 6'8" 270 lbs :D Which by the way strikes me as funny because of all the guys switching seat rails around and the like to gain legroom. I have a 36" inseam and no issues with legroom in a Disco. Btw, when you go to check the cc brake switch, you're gonna wish for another elbow about half-way up your forearm (speaking from experience).