front turn signal wiring at the bulb connector

the bulb connector has 3 wires, I just need to know what the middle one does. My HELMS manual does not show it. This is for a 95 civic ex coupe US version. Thank you all!

so the middle wire is for the turn signal. the parking lights are the red/black wire. I bought a test light to determine what was what. Posting incase anyone else has this question in the future.