Think I'm onto something, IDed some units in similar area but not having such large losses as 40 tanks.
From same site I linked to earlier.
113th Cav Rcn Sq Sept1944
Mentions battery of 88 mm guns and village of Cantaing which is in (roughly) correct area we're looking at.
This page 113th Cav Gp Sept 1944 says elements of 2nd Armored were off to the west and made a coordinated attack and reduced the enemy position.
Mention also made of 75mm and 88mm guns.

Thanks chaps, makes a change for me to look at an American battlefield.

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