There are 3 kinds of 1to3 (One to Three) OBD Splitter Plug Adapter for Tesla Update Accessories Installation here: 1. 20PIN AMD Ryzen - Right Front Door A-PIllar Trim; To Read Protocol from Passenger Seat - Right Front Door A-pillar Trim; Application: -For Tesla Model 3 Model Y after 2021 ; -For Tesla Model 3 Highland; -For Tesla Model Y Juniper. 2. 12PIN Intel Atom; To Read Protocol Under Armrest ; -For Tesla Model 3 Model Y between 2019 and 2020 ; 3. 26PIN AMD Ryzen OBD CAN Cable Socket - Rear Air Conditioner; To Read Protocol under Rear Air Conditioner; Application: -For Tesla Model 3 Model Y after 2021 ; -For Tesla Model 3 Highland; -For Tesla Model Y Juniper. Support Custom your Own Cables, Pls contact with us and tell us your detail demands.