Need help with Streetsweeper HLF on 91 Crown Vic CHP

[Hartge330Ci]

Hoping someone can help. I know the wiring schematics for the actual Streetsweeper HLF, but I do not know where and how to cut into the high beam wires on the 91 CHP Crown Vic I am rebuilding. I found a green/black wire that looks to have been severed by CHP and reconnected, but when I properly hook up the streetsweeper at that spot, only the driver side flashes and it flashes both high and low beam together.