I think it goes up over the started then down the passenger side of the bell housing.

Can't find any other pics of the 722 except on eBay: http://cgi.ebay.com/ebaymotors/TRANSMISSION-MERCEDES-300D-300CD-300TD-TRANSMISSION-_W0QQcmdZViewItemQQhashZitem2eaf0bb05cQQitemZ200505274460QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

Check that pic. The big metal line is what you're looking for.

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'85 300TD "Puff The Magic Wagon" - Rolling Resto
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter