Was this a new knife? Reason I ask is that is very strange since I've never seen one come out of the shop that bad. Not saying it can't happen but...
That knife should have been sent back to us if it was that bad. That is unacceptable.
Just put a red wire on either side and put the other red wire on the other side. It’s a simple on off switch. You can’t wire it backwards
The wires as shown in your pic are in the off position :)
If it's just a simple on/off switch then it's not going to matter which wire goes on which switch position. A switch simply opens a circuit.