Welcome to the forum.
I'm assuming your Durango has a standard 7-contact receptacle, but your trailer does not. Please provide more information on the miss-match. It is very likely someone may be able to help.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.