Don't panic. Call the folks at etrailer
. Their Web site lists a kit
for installing on a 2016 Edge. They can help you.
Here is a prior iRV2 thread
discussing the issue for a 2015. In that thread, the original poster used a Blue Ox wiring kit. Also, another poster says the tail light housings are not suitable for adding bulbs. Finally, a charge line to the Edge battery from the coach is recommended. You can read the posts for yourself.
There are enough differences between years and models that nothing is for sure. But, there is cause for hope.
You have not mentioned a braking system for your Edge. You may want to discuss that with the etrailer folks at the same time. Your having a DP would incline me to select the SMI Air Force One, but there are other alternatives.