After Glenn commented about the dash, and after I cleaned it up, I was wondering if there was anything missing here.
It looks like there should be a mesh grille over the 6 holes, but there are no mounting holes, clips or grooves.
However, I was thinking, if I cut to shape painted some of this scrap plastic mesh I found on a discarded laundry drying rack, and just dropped two long strips into the groove, one each from the centre, it could look factory and be a slight improvement.
Of course I have no clue what the original Mk1 vents looks like up front.
Any pics out there?