Ls swap wiring help

[Carolina68]

I’m doing an Ls turbo setup. And I’ve pretty much sorted through all the wiring. On this diagram I’ve circled two wires in. One is black with a bulb fuse near the junction block and it says engine harness connection. Do I need this wire if I’m not using any of the stock engine harness?

The other wire is black with a white stripe and it showed fused in the diagram but mine is not fused. It just ties into the fat red wire that runs to the junction block. Not sure what the black/white stripe wire is for?

I’ve searched and searched but no definitive answer. Thanks for any help and maybe if your not sure you can steer me in a direction to find the info.