What you need to know:
Starting an RV air conditioner is the hardest task in the life of an RV air conditioner; the unit uses 4 to 8 times more electrical current than in running condition. The power surge lasts just about one second until the compressor and the fan running with full speed.
If you're on shore power, this is probably not a big problem. But while Dry-Camping or Boondocking, your available power supply is limited.
The additional power surge cause problems on the generator and the AC compressor. It may not solve the starting problem with a smaller generator, but it will support a smother and faster start.
Installing a Hard Start Kit is very easy - and it might solve the problem.
The two wires are connected to the run capacitor terminals C and Herm - it doesn't matter which one goes where.
Your A/C is able to start up easier while on a generator or on shore power without popping the breaker, and you have a much better chance of starting and running the A/C using a generator.
Don't do it... Some unqualified folks are selling hard start kits designed for Home Air conditioning with up to 60'000 BTU. This oversized part may kill your air-conditioner because your RV-AC unit is much SMALLER, just about 13'500 to 15'000 BTU.