ground wire locations

[equalXlength]

Hey guys, i have a couple of issues trying to find out where my grounds go. Can anyone tell me where the ground on the back of the cylinder head goes? Also the ground from the wiper motor? I did a motor swap and some things are different. The o2 sensor has a different plug. The plug off the o2 sensor has 3 wires and the plug off the motor has 4. Is the extra wire just a ground? Any help is greatly appreciated. Thank you

 

[Sicktight722]

what motor did you swap in? on my 1990 2.9L there is a ground that goes from the back of the block to the body beside the wiper motor. I think the wiper motor ground may go there too.

 

[equalXlength]

its a 1989 bronco ii with a 2.9 and i swapped a motor in it from a 1989 ranger with a 2.9