I stopped by the shop on my way to work today. The first post is now updated with a real photo. I tried to take a close up of the connection nearest the magazine well, but it's very blurry.
Many thanks.Called the ULTIMATE Trigger Actuator invented and patented by Patrick Teel and manufactured and sold by Firearms System & Design of Minneapolis, MN. Supposedly made back in the 80s and I don't think it's manufactured anymore. I have no other info about it...this is from Google but hopefully it helps?