How to know whether enemy tanks are loaded with infantry?

[RightDeve]

I'm at the very moment playing a scenario in which some british tanks are loaded with infantry. Once I fired a playful mg shot at one of those shermans and lo end behold it popped up quite a bunch of discontented britons.

dont want to fire at each and every armour to know whether they have infantries latching or not, since the return fire is quite troublesome.

any way to know whether an enemy IFVs are loaded with infantry units? In real life it's quite easy to spot them bastards hanging on turrets