Bob, that's the endless band system from Suntour. Don't know why they abandoned it, IMO, it made for a clean look.
One end of the band simply loops over the bolt. There should be enough clearance.
I'm in need of one of those bands! My Suntour FD came with it missing! Should Kalifornisky or yourself plan to part this piece out, PM me!

NOTE: Upon thinking, Shimano also released a FD with a similar band mount. I've not come across it and don't have working details. Maybe you have a Shimano band?

[family belly]
Ah yes, the missing extra step. Strange, I had no trouble mounting a new Cyclone II FD with this system onto my brother's Triumph. But we did have the Suntour instruction sheet.