what is the Capote tool

Hello. My 360 did not have a tool kit. I am considering buying one on Ebay, but I thought I'd rather assemble my own, as I want it for functionality not presentation. The Only tool I cannot discern is the attachment that connects to the T handle Allen wrench for manually operating the top. A picture or description of what this attachment is would be much appreciated. The owner's manual refers to it as a "square coupling insert". Attached is the page from the owner’s manual for reference.
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Thank you very much. That Picture answers alot. I thought it strange to have an attachment just for pushing a piston. So it's main purpose is to unlock the latches in an event the top fails. That saves me from buying a tool kit on ebay just to get a special square end.

BTW what size is the T handle allen wrench

 

Thanks Wade. I'm building my tool kit now, that really helped.

Cheers
Lance