Thanks for the info guys, I was unaware that they made adapter cords! This is our first 50a rig, so I'm not familiar with the setup. I assumed that the female side on the RV would have 4 prongs like the plug, not 3 with that ground plate on the circumference of the plug.
The breaker panel is a Progressive Dynamics, and has the staggered buss bars like you would see in a residential panel. I should have snapped a pic when I had the cover off, but it's wired so neatly, it looks like a residential panel set up by a pro electrician. The 12v panel is separate and installed next to it, and the PD9260 converter sits by itself in the basement. Our old Terry TT had a WFCO setup where the 120v, 12v, and converter/charger were all sandwiched into one partitioned box.
The trailer is set up for a W/D but there isn't one currently installed, and although pre-wired for a 2nd a/c, that was never installed either. This was the only shore cord we got with the rig.
Still debating about adding the 2nd a/c...One one hand, the main unit sends very little cold air up to the one duct in the bedroom, so adding a bedroom unit is a must for air conditioned comfort. However, the bedroom unit would install in place of the roof vent that that's there now, so we would lose that source of air circulation when boondocking.