My 2017 36CKTS.......the heater is on the other wall......above where your black electrical receptacle is. And I have WAY less space to the outside of the washer dryer than you do. No room for a door or cabinet.
I've seen a lot of 36CKTS, from 2012 to 2017, and they're all somewhat different there. There's a lot of plumbing changes that SHOULD have been made to make the installation easier. I had to cut down and move the closet vertical support to get mine in there, and use elbows on the faucets to connect. It was just a smidge off from being big enough. But I got it done and it's fine.
"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
2016 GMC Denali 3500Dually--2017 CC 36CKTS