Engine Block Ground Cable
 

So I just put a new starter solenoid in my 1987 F250 6.9L. It went fine except for finishing and realizing I hadn't connected the engine block ground cable from where ever I took it off from while getting everything off the starter solenoid. Now I have no idea where that's supposed to connect! Help anyone? Sorry it's such a dumb question. I just don't feel like shocking myself or starting a fire.

I did start the truck before realizing I didn't have it connected and it was reading off the voltage meter. Hope I didn't damage anything.

Here are two pictures. The first is me holding the cable that I don't know where to put. The second picture shows it on the right side along with the rest of the battery setup.

Attachment 292901
Attachment 292902

Thanks for any help!

Oh boy, I'm a fool. Answered my own question after looking a bit harder at a wiring diagram. Sorrrrrry.