To add the 4 point docking system to a 09-13 Electra Glide you need to purchase the Fender Supports found on the other touring models.The diagram shows how they mount. The price and Harley wants $130 per side, however these are easily found on ebay for ~$50 for the pair!
https://www.harley-davidson.com/store/-pa-02-5324609b--1
Left/Right Fender Support
47502-09A
47504-09A
