Location of fuses for webasco heater on 2019 R23

[B&C H]

Hi
Our 2019 R23 webasco heater has loved us out. We aren’t sure what the issue is because we can’t reset to get an error code.
We looked for the fuses in the panel behind the helm and for a wiring harness before the controller— no luck. What have we missed?
Your guidance would be appreciated! Thanks
Bob and Caren

 

[B&C H]

Oops! Locked us out— lol

 

[B&C H]

Good news. We went back through the tugnuts archives and found text exchanges from 2021 from Salish Seaker trying to solve the same problem.
We found the square hole below the control panel in the doghouse. Our troubleshooting process begins!
Thank you.