Apologies for the n00b question, I've looked everywhere and haven't been able to find the answer. I'm in the process of trying to bleed my brakes, which I've never done before. I'm working on the rear and have been trying to find the bleeder valve so I can use my tool I bought to bleed them. I have huge play in my brakes since I bought the car. Does anyone have a picture of exactly where it may be location or they can explain?
Edit:nvmd there was a sensor with a rubber gasket actually covering it on right rear brake, thats what was throwing me off.

 

Does this help (see red arrow)?

 

Thanks, yep I found it. I started on the rear right wheel and there was a sensor that was attached behind it, didn't think to try to take that off but found it with trial and error.