Wiring up a 4-pole trailer harness to a 2016 Subaru Crosstrek (all years same) and a through-bumper mount 4-pole connector so you wont have your harness dangling down.

Here are the Amazon links for products used in this video:

Curt wiring harness - http://amzn.to/2dIAYBZ
Curt 4-pole adaptor - http://amzn.to/2dFviMQ
Black RTV adhesive - https://amzn.to/3ySiFUd