Possible ac problems and other Questions.

[Hayesgeorge]

Ok so first time actually trying to ac since I got the bus. The rear ac cooled down. I didnt have a means to check temp but noticeable. The front/side unit did not. Probably a little low on freon. One question where is the drain for the rear ac? It leaks in the floor. The front/side has a cover on the hoses etc drain included. Next. How imperative is it that i remove the floor?