Fuel Pump Wiring Question. Previous Owner Mess

[T Money]

I am trying to clean up the previous owners wiring mess throughout my car. I found something odd when doing a fuel pump rewire. He spliced the little black wire into the big black wire at the fuel pump side (pic 1) and then spliced it back in on the drivers side under the rear speaker (pic 2). Can anybody tell me what he was trying to accomplish? Should I separate the grounds or leave it?

 

[turbo24]

i would put them back the orignal way but just for safety check the wires with a dvom for resistance (ohms) along the wire your slpicing back in and between ground there may be a bad wire or a poor ground in there hence the additional splice to avoid the bad wire

 

[ilikerice]

+1^^ id also heat shrink exposed wire also. i know its a ground but for corrosion puposes.