Steering Column Wiring Harness Question

I see three "hooks" that secure the wiring harness (or single wire?) on the steering column support of the '65 Formula S. Two of them are "run-of-the-mill" rubber coated hooks. But the third hook, which points down toward the floor, has no rubber coating, and shares a common fastener with the rearmost rubber-coated hook has me a bit baffled. I wonder what role it plays in all of this? Thank you (if you are in the know).

chrome wire hook copy.jpg