Another Kenne Bell Boost-a-Pump Install question

Okay, I've looked all over the place and gotten all the information I've been able to find on this. Unfortunately, alot of it is conflicting. Even on Kenne Bell's own directions!
I have a schematic that shows to cut the Brown/Pink wire and then a suppliment page thsat says to cut the Pink/Black wire WTF!!!

Then I have another source that says to solder the non-fused (output) wire to the plug side and 2 sources that say the fused wire goes on the plug side. WTF again!

Help! My project (2 hours? HA!) is now stalled.

But there's only 2 red wires. Input (fused) and output (non fused) , so it can only cut into 1 hot wire.