If your unit doesn't have any 240 volt loads, it may be OK to tie the 2 hots together on the generator side of the transfer switch.
If you've ever used a 30amp to 50amp converter 'dogbone' pigtail to use a 30 amp campground pedestal, that's what it does.
Best to double check with Jayco, though.
2016 Greyhawk 29MV
2009 smart toad ( Coming Soon- Jeep TJ )