Last pigtail under dash....need to know where it goes

[Chevy3+3]

I have found where my other plugs go but this one I can't seem to find. I had to remove it when I pulled the pedal assembly out. It was run in between the column tube and pedal assembly bracket. I cannot seem to find where it was plugged in at! It's driving me nuts. The wires are pink & purple. I have looked through wiring diagrams but can't seem the find this animal.

Anyone have an idea?