pdplot,
If I'm understanding your dilemma, the "rubber" covers are actually metal, and must be pried off to get a wrench on the bolt heads. It is a bit of a job,
as I think this assembly is something of an anti-theft. Once those caps are off, the bolts can be removed. You will need the "H" piece, which I see
as item 128 on the Moss exploded diagram of the steering column.Part 128 is an aluminum piece that is bolted to the metal under facia of the dash.
Dennis