The serial number label for lateral files is located on the left hand, exterior side of the upper most drawer or shelf.
If you have difficulty locating the label, fully open the uppermost drawer or shelf and "clap" your hands on the drawer sides. The serial number label should be under or near your left hand. If you have an older cabinet, the label may be located on the inside, back of the uppermost drawer front.
Once you have located the serial number label, your serial number is the alphanumeric code directly in the center of the bar code in large print. Directly below the serial number is your product's model number. The color of the product is located under the product model number.