It should'nt really matter exactly where they go as long as they are clean and well grounded. i.e. no paint/rust between the cable and the chassis and/or engine.
You must have one from the neg terminal on the battery direct to the chassis, and on mine the engine is grounded from just above the starter (350 SBC) to the chassis.
Good luck.
I should listen to myself!!!
I just found out today how important good earths are!!
I tried to fire up my A.D. for the first time and my poorly fitted ground cable got red hot! DUH! dang

Last edited by jockbolter50; 05/31/2008 3:57 PM.
1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.