Turn off rear indicators / turn signals

Dear fellow Mustang drivers,

I brought my Cali 2016 Mustang Convertible to Europe. To pass inspection I have to (temporary) add yellow rear indicators. I will take the wire-signal for the indicators from the front indicators. But I need to turn off the original sequential red turn signals. I have forscan. Does anyone know which cable to cut or what to code to the rear BCMB / taillights so it will do nothing when I turn on my turn signal? Or only make the most right or left chamber blink and not all 3. (Than I can mask the last one with foil)

Thanks you all very much in advance.

Without having to touch the software, you can unplug the tail lights and temporarily connect brake lights in the same fashion as the turn signals. I wish I could help with forscan, but I need a portable computer.