How handy are you with 120V AC wiring?
Are you comfortable working with electrical?
Do you understand how your RV transfer switch works?
Wiring should be #6 which is tough to work with due to size...especially if previous install is in tight spot/wires short.
Got to really man-handle it sometimes.
you will have wiring from your plug coming into transfer switch
you will have wiring from generator coming into transfer switch
you will have wiring going to main AC Panel coming out of transfer switch
disconnect wiring from switch terminals
Removing wiring from transfer box
reinstall in new box
connect wiring to switch terminals
label/take pictures.