where is the hot water heater on a 189fbr?

[og3]

I am trying to learn this trailer, no manual, of course, so I need to know where is the water heater, and how do I turn it on? It is a 2006 189fbr.

[shadow]

under the front bunk left side, drain ports and exhaust are on the left outside just below the fresh water fill. At least that where mine is on 2012 fds

[og3]

Thanks