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BondMax
What ^ is refering to are two different dimension fittings/bosses - one for steel frame and one for aluminium, as have different sizes down tubes (part No 7 on below diagram).
What the left shifter is actually missing is a bit of a guess as not visible from picture, it could be anything from part No 9 - part No 12, I suspect all 4?
No 9 can be substituted with No1 IMO, it is on sale at SJS, otherwise check online using parts numbers - details on Shimano website.
Some of the parts are available at SJS