Why not cook marshmallows on my under dash fire?

Also, I am getting rid of all of the factory "wire welds" in the harness seeing as how the two I pulled apart were corroded.

Also, where my 14g red and black wire feed to and from the ignition switch, I have decided to bypass the plastic plug that it runs through seeing as how the wire got hot and started to melt the plug. The ignition switch side of the plug seems fine, but I will be going around the plastic to prevent melting in the future.

P.s. I replaced the entire 14g black wire and red wire since the old one had gotten hot enough to soften the outer shell of the wire.