alfred,
so the photo from bob and your schematic can be confusing.
if you look carefully at bobs photo,
77 goes between the incoming metal line and the rubber hose
then
79 thru 81 bolt to the chassis and also hold 78, the large hole in 78 holds the end of the rubber hose.
when I replaced my lines I had to loosen bolt 79 to allow 78 to align with the new hose so I could line it all up.
matt
Matt
66 230 sl - "white"
78 300 D - Blue
98 C230