I guess this isn't any different from a standard RV50A MALE PLUG to two RV30A FEMALE SOCKET adapters.
![](https://images3.campingworld.com/CampingWorld/images/products/7000/1000x1000/72437n.jpg)
Your plan looks a little more heavy duty maybe... Hoping the combined weight of all of this will not want to pull the RV50A PLUG out of the camp ground pedestal when all is connected up. You may want to secure the two RV30A Plug ends of the two shore power cables to the camp ground pedestal using a stretch rope maybe...
Looks like it work just fine as long as you never cross the NO-NO hookup situation of having a HOT PLUG with prongs with AC VOLTAGE on them. Your two 30A shore power cables will plug into the two available RV30A wired receptacles of your adapter.
I didn't read close enough but I assume the two separate 30A feeds for the modified BOAT POWER PANEL inside DO NOT EVER send AC VOLTAGE out to one of the unplugged 30A Shore Power Plugs under any circumstances which would be deemed NOT SAFE. i.e. NO WAY to CHEAT the SLIDE LOCKOUT lever to create an UNSAFE condition of having HOT AC VOLTAGE on your RV30A plug end of one of the RV30A Shore Power cables when unplugged from the 50A source receptacle...
I think you know what I am referring too...
Roy Ken