The yellow wires on my 2016 Bronco enable the engine cut off when you are not seated. What do you have to do to mow in reverse? Thanks

Hi,
I am not able to answer that directly since am a certified mechanic. Saying that I am also a certified electronics technician and can say that only two circuits exist in this case. First is an open circuit where you simply unplug the wires, and secondly a closed circuit where you tie the wires together.
Peace,
Clarke

Also I will state, in the over 45 years I have been mowing grass... I have yet to see a mower that does a satisfactory job when cutting in reverse (they all seem to load up and not blow out effectively)... or seen one that shuts down and doesn't cut when in reverse