CB700's have been around for a long time. I have to wonder about their particular timeline alongside Pearl's.
The kit you have, with those lugs seem to be 70's. I've had a few CB700 kits with the key hole-ish looking lugs. In fact I've got one in the garage at the moment awaiting cleaning and restoration with the key hole lugs. They aren't awful kits, but man are they full of boom! lol!
From the catalog on this site, it seems the key hole stuff was 80's. Does Pearl still crank these out? The quality of the ones I've had seem to be far superior to some of the entry level kits sold at the time.