the scenario: brake lights are not working, globes are fine, fuse is fine so my guess is it is the brake light switch. there is no switch behind the pedal, i have been told this is located on the master cylinder???? not sure which plug it is or even if i am looking at the right thing. there is a plug on top, the side and something that is not even connected to anything. i have attached photos so u can see what i am looking at. please help!

photo shows one on side and one on top


photo shows one going nowhere