TH Clutch Bolt M10x70 or 80

I have a low serial TH W06X4HD005401 but its missing the secondary clutch bolt. Transaxle AM133460 with serial 037095.

The attached deere parts page has options for 2 different bolts:
19M7809 M10x70 (use with long input shaft) and
19M7810 M10x80 (use with short input shaft).

I asked the local dealer who sold me the bolts but he said I'd have to bring it in.

Anyone have an idea on M10x70 or m10x80?

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