Hi Hilta;

there should be metal sleeves - rectangular shaped with rounded ends, that fit in the body holes to hold the trims (similar idea to the inserts that hold the body badge pins). I didn't notice them when removing the trims & lost a few. Rares didn't sell them at the time so I visited a wrecker a found a few still attached to old trims.

If the correct sleeves are used the trims fit tightly and there's no need for sikaflex.