its for getting the elevator and the gas

Someone can make a tutorial for the map puzzle?

Basically, a few of my friends and I have figured out the tram escape secret. Before you continue reading, just letting you know [A Traitor HAS to be included in the process]. So basically, if you are the Traitor, or a friend of yours is, you go into the Traitor room, and there are like 5 - 6 explosives, that look like C4's. Around the map, there are control panels. You must place every C4 on each of the control panels. 1 being at spawn, 1 in the box room downstairs, ETC. Once that is accomplished, you will hear a siren go off, which indicates that the shield barrier for the tram has been disabled.. Once you make your way to the tram, "Which can be found by going in the downstairs elevator," you will see that the red shield barrier has been disabled of course, you will now sit peacefully on the tram, and you will have to press the button infront of the tram to activate it. Now that you've done that, the tram will escape.

what do the control panels look like?