I concur with M1 A1 A2 . Without seeing a picture or a better description, it sounds like he is talking about the CIPs on the front slope of the turret. These do have "L"-shaped pieces of velcro on all 4 corners as well as the corresponding "L"s on the turret front slope to secure them to.
To represent velcro, you can apply thin pieces of masking tape, painted green. Or green decal strip applied works too. You can also use thin pieces of 0.010 sheet styrene applied to the tank and paint it green as well.
Good luck.
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