In my previous camper, the port from which the 30 amp cable came through was in the very rear of the camper. The power converter was about half way towards the front of the camper. The 30 amp cord was hard wired to romex cable in a junction box under the rear bed. Romex cable ran from there to the power converter.
Had I needed to replace the 30 amp cord, I would have only needed to pass it into the port to the junction box, attach the cable restraint on the junction box and use twist nuts to attach it to the romex.
FAA A&P mechanic, ex-RV dealer parts dept
Retired B-52 Gunner/Flight Examiner, B-52 Crew Chief
2016 Jayco Eagle HT 29.5 FBDS w/ 15,000 BTU AC, 50 amp service, upgraded counter top, thermal pane windows, elec. stab jacks, outside grill, backup camera and MORryde pin box.
2011 GMC 2500HD DURAMAX/ ALLISON