What is the correct style cover for a manual brake master cylinder on a 1970 Duster? Lever or Bolt in Center?

The one on the left is for drum brakes although not correct appearance wise. the one on the right is for disc/ drum applications.

Correct style is the one on the right with the wire hold down as mentioned.

For the gotta be original crowd the oem part number for the 1970 a-body disc brake master cylinder is 2229171 (I think). Those are hard to get, and the prices can be absurdly high.

I bought a 70 Duster around 76 with 25,000 miles, /6 auto with standard disc and had the one similar to the one on the left, easy to tell it had never been off. Could have been a mistake from factory. Made into a race car and was the best stoping car I ever owned. Original has a strap over the top where he bolt goes thru. Every power disc brake one I have seen has the one on the right.

My manual 4-wheel drum '70 Duster (/6) uses a bolt on cover. It's been in our family since '78 or so.

Drum is bolt on. One shown in OP's picture is an aftermarket, the one in this ebay listing is original
Drum master cylinder
Disc used a bale wire hold down. Original casting number was 2225541