Ideally you need the 'Morgan Tommy Bar' - available at all good Morgan suppliers, but any lever/bar inserted in the holes would suffice - screwdriver, allen key etc....
The centre screw holds the knobs on as you suggest.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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