Help with winterizing Sunnybrook harmony thx

Hello.

I went to winterize out new to us 2010 harmony thx toy hauler by Sunnybrook and it seems my setup is different than what I have been watching videos for. I will add some pictures of the flow jet. So far I cannot see how to access the back of the water heater to bypass it. The only place is maybe under the bed there is a bolted down board. Could it be under there? What a nightmare if so as it will be hard to get at that with the bed and bed platform struts. Under the sink where the floor jet is, I have added a picture. I have these two little petcock to the right of the flow jet that may be what I am looking for but I am not sure. Per the pic they are circled in red. Not sure what those do. The blue seems to run the cut hose for dipping into rv antifreeze, and the orange is the water line coming from the water storage tank I believe.

Any help woupdate be great. Sitting here staring at it now. I also see two blue tabs on the in and out line physically on the pump. Am I suppose to pull those out for anything?

Thanks again .