The pin just clicks back in. If it won't, then you damaged it when you removed it. (The correct way to remove it is to just slightly lift up the plastic locking tab while pulling on the wire.)
Thanks for the reply. I thought I was pretty careful when I removed it, but I think I must have damaged the pin. I thought I finally got it inserted all the way into the socket, but I'm still getting the nag screen saying I have the parking brake connected incorrectly when I hit 10-mph. So, when I get a chance I'll try the software hack....