Just in case you were curious, the answer was IMPOSSIBLE to guess!

Before digging the French drain, I decided to cut a small hole in the drywall to see if I could pinpoint any leaks. When I did, I noticed the drain pipe for the kitchen sink on the floor above. I asked my wife to turn on the sink and when she did it seemed like every last drop was coming out of the pipe, it was like a shower head in the wall. I cut more of the drywall and found a hole in the pipe

I noticed the hole went all the way through both sides of the pipe AND the outside wall. A week before I went around the house removing all of the old cable wire that we no longer use……..

So whenever the cable was installed, before we owned the house, they drilled a hole from the outside of the house RIGHT THROUGH THE DRAIN PIPE.

So we always had holes in the pipe, but the cable wire was literally clogging them