I pulled the knock sensor harness to inspect it and I found the male 2 pin distal end has 2 wires connected but the wire is taped down to a single wire that goes to the proximal 2 pin female side that plugs into the knock sensor.

Is this the normal wiring set up?

 

it's normal.

 

Thanks!

 

yeah its really weird but normal. Honestly I really dont know how this thing grounds. lol I guess through the block. Not a very good ground tho