yes - I cannot measure your terminals - but you can get 50 mm , 75 mm diameter and up heat shrink - if you cut a piece 50 mm long and slipped it over the unused connectors and shrunk it - they would be insulated
you may also manage to do it with the ones with lugs on them - depending how much higher your cover was going to be - iven if you shrunk only the height of the teminal is would still minimise the risk of a bolt coming loose and shorting a terminal
it may be overkill - just an idea