Ground and battery issue and knock noise?

The truck listed above is a c1500. I had some electrical problems, I think. Hope they're simple. I was having grounding issues and think that's fixed because my battery gauge reads 11. It was running after I did a ton of work on it, new starter, alternator, front suspension, brakes, but was having grounding issues due to putting battery behind seat while I did front suspension work, when I put it back it started and ran for a while but was losing power, and dim lights. Then started making loud knocking. I was told may be module on distributor replaced that and new cap and rotor, and wires. After no success I reset timing mark and TDC pointing rotor at number one cylinder and sounds like it wants to start but won't. I thought I had weak spark, so I replaced the coil. Now I think may have gotten wires mixed or something and can't find a diagram telling me where do + and - wires lead off battery. Also, every pic I have found of junction block, seems like mine is missing wire or is misplaced. If you could help me troubleshoot, I would be forever grateful.