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coventry_eagle
https://rec.bicycles.tech.narkive.com/1OIXhKT5/bottom-bracket-for-mavic-631-cranks
Halfway down the page there is a comparison of JIS, ISO & Mavic BB tapers.
Mavic looks closer to ISO.
I have a set of Mavic starfish cranks that I use with a 102mm ISO bb. But it is a singlespeed setup so that doesn't really help you. (41mm chainline)
My guess is a 114mm ISO bb or there about will work for you. (+6mm each side so the large chainring is at 47mm chainline)
Where should the chainrings be at campagnolo 10s? 40-47 (43,5mm)?