Pleasant Valley Teardrops | Little Guy 5 Wide Rough Rider

I have a 2011 Little Guy 5 Wide Rough Rider manufactured by Pleasant Valley Teardrops. I am wanting to mount a Dropleaf Solar Panel to the galley hatch. I am looking for information on where to mount the brackets for the solar panel without causing unwanted damage to the hatch. Does anyone have knowledge about how the hatch is/was constructed and where I can mount the brackets?
See attached image. I contacted NuCamp tech support and they replied with this as probable frame location. Can anyone corroborate or add to this?
See attached image. I contacted NuCamp tech support and they replied with this as probable frame location. Can anyone corroborate or add to this?