I know I originally struggled locating the security module for they bypass cables, so I figured I'd post my findings. This is for 2018+ dodge/ram/jeep vehicles
Charger-Under driver side lower dash panel.
challenger-behind radio. Remove radio bezel or pull center console backwards.
4th gen ram-behind radio
jeep wrangler-driver side kick panel under dash. No panel removal necessary
grand cherokee/durango-passener side under glove box, at transmission tunnel
5th gen ram-under driver side lower dash. No panel removal necessary
I think, but can't remember for sure
300-same as charger