I recently purchased Filler Panel Lights for between my saddle bags and the rear fender of my 2018 Electra Glide Police Standard. I also purchased turn signals for my saddles bags as well. The filler panel lights were plug and play and I used a Ciro splitter to incorporate the saddle bag lights into the turn signal circuit.
Everything was plus and play ! Everything worked awesome !
I am very happy with Ciro & their products............