When they are separated, put the light colored half on top of the dark colored half and make sure that the assembly holes were properly matched.
Put the metal vent into the slot on top part.
Place small section of metal vent into slot and slide it till it is fully in place.
Assemble both doors in each opening and make sure that the door rods are in recess for proper door operation.Both doors can be hinged for right or left swing as they are interchangeable.
Insert metal bolt from bottom into the holes and thread on plastic nut. Complete assembly around the whole crate.
After setting it up, check if the doors operate properly and if it is secured enough for your pets. Also check nut and bolts that is holding the top and half bottom from time to time to ensure that it stays tight.