Did you screw fasten the wires to the new connector like a household plug?
Yes, very similar. Green wire to green screw connector, white to silver, and black to brass. It might be a good idea to plug in when you're done with a wiring tester like this SnapIt Circuit Tester
There is one additional wiring complication, though. When I did my wiring job I simply cut the heavy rubber case on the 30 amp cable back with a utility knife to expose the insulation covering the black, white, and green wires. The challenge with cutting the shore cable back is if you goof and cut past the rubber sheath into the insulation covering the individual wires you have to strip the cable back even further and go for a clean cut. If you blow it multiple times you may wind up eating a couple feet of shore cable up and not have enough left to run from the inverter box to your shore connector.
Given that you're not an electrical
wiz I'd suggest another method: go to the hardware store and buy some 10 guage Romex NM-B 10/2 cable. Get enough Romex to make it from your inverter box to the shore connector port with a couple of feet to spare.
By going with the Romex you'll be able to use the pre-stripped ends of the shore power cable for the plug at the trailer-end of the cable, you'll wind up with a longer shore power cable, and you'll find stripping the Romex back is very easy to do.