Not sure I understand your question, but if you are looking for the connector that you used to connect tour pak lights to on your '07, that harness is used for the LED light in the bottom of the rear fender. It's probably zip tied to the antenna cable along the left frame rail and you can trace along the harness/antenna cable to find the connection.
If you want to create a Y-connector/pigtail to plug both the tour pak lights (for the Y-connector in the kit your purchased) and fender LED into, these are the part nos. you'll need in additon to wire:
Pigtail to plug into the TP harness to create two connections: one for the TP lights' connector, and one for the SG LED:
1. 73103-96BK (used to plug into the bike's TP harness. The wire terminals are 73190-96; three required, but they're cheap so buy a couple extra in case you screw-up the crimp--return the unused ones if you like).
2. 73153-96BK (used to create two connectors for TP and SG LED, so buy two. The wire terminals are 73191-96; three required for the TP lights; two for the SG LED; but, go ahead and wire both with three wires, so a total of six required, but buy a couple of extra.
Good luck with your project.
Carl