This thread is hilarious.
Thankfully morgans got here and sorted things out. I wrote this reply before reading his reply, so I'll just leave it here.
Ghetto solution:
Connect all 3 of those wires together with a bolt and wrap them up with electrical insulation like a motherfucker to protect them from grounding out.
If you want a better solution, Chris mentioned running an entirely new power cable. Or you could go the distribution block route like I did.
Let me describe what you have so it will make sense if you'd like.
The smaller wire with the red connector and OEM loom - This routes to the fuse box and gives everything inside the cabin power. It has a built-in fuse (inside the red plug thing). This needs power from the battery.
The thick black wire with OEM plastic loom - This routes directly to the starter motor. This needs power from the battery.
The thick red cable - This thing routes back to the positive terminal of the battery. This brings power to the engine bay. This should provide power to the two wires mentioned above.