Welp...appears it was a coincidence. Coolant level is back to below max line and slightly above min line. Always something.
Since i wasn't able to see level i decided to remove the grommets. It was fairly simple. Carefully pry the center part up, then the groqmet will pop out. Its only nessacary to remove the three main grommets. The duct for the air cleaner easily pryed loose then just pull up tilt the whole cover back. Sorry, my car is very dusty under the hood.
I just out of curiosity checked mine & it was below the minimum. So is there different tanks to fill? That one being for the engine & another one being for the battery?
Sorry for the late update. As suspected by mrfixit, I was reading the tank level incorrectly and it appeared empty due to bad lighting. I used a high power flashlight and aimed it at the tank from the front grill which lit up the battery coolant tank enough for me to confirm it is right at the min line. Still slightly concerning that it is so low after just 3 years of ownership on a tank that is not suppose to be customer serviceable.
A few months ago I finally took the shroud off (thanks @neal adkins ) and filled the coolant tank in question. Mine was right at the min line and it took ~1 cup (8 oz) of Honda Type 2 coolant to reach just south of the max line. As for the shroud...only have to remove the 3 push pins visible along the rear edge (furthest away from the grill) and the rubber portion of the air intake. Once 3 pins/air intake are removed and you begin to pull back the rear edge, you will notice some resistance. Along the front edge (edge closest to grill of the car)...4 tabs and 4 push pins hold the shroud down. You cannot access the push pins by removing the rubber. I found it works great just pulling the front edge straight up...working from one end to the other. The 4 push pins slide into plastic brackets on the shroud. Two of mine slipped out after removing and setting on the floor. When I went to reinstall the shroud, I had to hunt around for the two that had fallen on the floor...slide back in and reinstall. All in all a really simple task if one is inclined to fully inspect that particular coolant tank Hope this helps.