It has been quite a while since I installed load equalizers for the LED turn signals on my 2009 SERG 3. Can't tell you what you're doing wrong because I can't see what you are doing. It should be very simple and there should be directions on the HogWorkz website. If not, Google / YouTube are your friends.
Example:
https://youtu.be/Z3Rw6BA5sZo?si=nRU6w-HUZH9IHpbk