Position the locking latch against the exterior of the shed, with one-half of the latch on one door and the other half against the other door. Press the latch against the metal firmly, then mark the locations of the bolts that protrude from the latch.
Drill through doors at each marking using a drill bit that is just slightly smaller than the diameter of the latch attachment bolts and is made for drilling through metal. Separate the two halves of the latch and set them in place using the bolts. Make sure that the doors open and close smoothly and that the two halves line up evenly.
Fasten the latch on the interior of the doors by placing the included washers over the end of those bolts. Slide the washer up against the metal surface. Place the included nut on the end of the bolts and tighten them by hand as far as possible. Use the wrench to tighten each nut further until the attachment of the latch to the doors is secure.
Check the attachment position one more time and secure the latch shut using a high-quality padlock.