This may be a stupid question but where do you connect the power on a 69 radio, i can't find it anywhere on the radio?

I never pulled out the radio on my 67 or 69, so can't say for sure. If it is typical GM, there should be a small radio harness that contains speaker wires, hot wire, ground, and light connections and plugs directly into the factory radio. If you are dealing with an aftermarket radio you may need an adapter that splits out the different wires.
Clyde

There should be a red wire and a black wire. red is positive, black is negative.