Based on a past post, I think you have a 2018 rig but I don’t know what model.
The converter in my rig is behind the fuse box at the steps - see screen shot.
You need to always include your year and model with each post to get the best help.
What if I told you “I have a problem with steering in my Chevy”…you need to know if the problem is with a 1972 Corvette or a 2015 Malibu right?
After several calls to Keystone and only given the standard answer of its behind the fuse panel we called the fuse box manufacturer. They said the easiest way was to remove the fuse box and follow the cord from where it plugs into the box. Eureka! We found it among the plumping in the pass through.
I had to replace mine in my 2017 MH 380 and to find it you will need to remove your power panel. Mine was plugged into the back of the CB panel. The cord led to the top of the area behind the the front storage area. It just had a couple screws holding it up and easy to remove and replace. If you have bought your replacement. The ccrd length will give you a clue how close it is. Good luck.