Brake light switch

I just put Glens flasher/turn signal beeper on my bike today and noticed the signal didn't pause when I hit my rear brake. After reading Deersleighers post, I've realized that my rear brake light doesn't come on when I depress the pedal at all. He says there is an adjustment screw down by the pedal. Can somebody tell me where is is. A picture would be even better. I have a C, but with the R boards.

I've got a pic of it at home...i'll have to upload it once I'm home.