There is also a fully browesable online service manual listed at the beginning of this tech forum. Ford Service Manuals - S197
Go there if you need to. click on 'wiring diagrams'. then under component locations you will find an underhood diagram as I sent you but maybe more readable. there are two grounds at right side of car underhood both on top of radiator support. Best to look at them online if necessary to figure out which is which.
also under wiring diagrams online is 'grounds', which is of some help also.
To download any of these pdf files takes some wait time for them to load...at least for me...you see only a grey screen until they are finished downloading.
Note : just now looking at diagrams again, I believe that the other ground on top of rad support is for the PCM engine computer...ground G102, G103. So, one disconnected, car won't run. Other disconnected lights and rad fan won't work.