Was looking in the closet on my Elkridge at the pre plumbed washer and dryer set up, and found a 4 inch hole with a screw cap covering it. I presumed (big mistake) that it was the vent for the drier but upon examination when I removed the cap that behind it was the drain and water lines for the washer. So now I am curious where is the vent for the dryer or will that have to be drilled out upon drier install, any ideals?