My TT has an electrical junction box attached to the frame. The pigtail is connected to the trailer wiring inside this box with wire nuts.
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2021 Transcend Xplor 247BH
Husky WDH with Sway Control
2021 Chevy Silverado 2500HD LT 6.6L V8 Duramax
Forever in my memory. Forever in my heart.
Laurie J. Wood 3/22/67 - 8/23/19
My Surveyor has an access panel screwed to the underbelly. I'm sure you have already looked but personally I would replace the entire cord about 5 or 6ft. The only time I would splice would be to get me somewhere to replace it.
After you do the repair, make up a Departure checklist and post it by the entry door.
We've used ours for 15 years and it's saved us a number of times.