Just unplug the passenger O2 and remove it. Put the WBO2 in place of it. Tap the narrowband output wires from the LM-1 into the EFI harness at the ECU. If you ever want to switch back, just unplug the narrowband from the LM-1 and replace the OEM O2. I wouldn't bother cutting anything.
Later
"If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut." - Albert Einstein
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?