Engine wiring harness?

[Freejax]

Hi guys as you may have heard I have had an engine fire, I am now in the process of rewiring the rear end of my car, some of the wiring is salvageable, thank god I can still see where all the colours go. I have a few ideas and would like your opinions.
A) I am going to remove the wiring harness connection because mine is melted, I do have a spare but I think if I hard line it and remove the plastic connector it would really clean the wiring up with a large wire loom coming from the body and branching off to smaller ones for lights, alt. coil etc.
B) I am really unsure why there are three power wires joining in the orange plastic three way connection attached to the body, can I just run these as hard Iines as well with a three way connection, insulate them and add them to my main wire loom?

[toytron]

You could attach them all. The factory did it that way to make it easier for the assembly line. If you do you need to make sure you maintain a solid connection.

Ed Stevenson

[Freejax]

I am soldering all my joints and double shrink wrapping the connections, might do electrical tape over that and then some wire loom to cover it all up.