How can I be sure that I am snaking the correct hole in the laundry room floor drain? There are two.
Look at the image I've put up. The hole that goes down is the drain while the hole on the side near the top is for the snake to enter so the floor drain can be snaked if necessary.. This hole will have a threaded plug that must be removed to snake the fitting. Good luck, Tom

Sbornus,
Somehow I posted your answer with your question. Sorry for any confusion it might have caused. Tom