Poke or drill holes (some people melt holes with hot nails or soldering iron) in the bottom (and near base on the sides) -- making sure the holes will make contact with the wet capillary mat, make sure to tamp down the pre-moistened potting mix all the way to the bottom of the cups. The potting mix will wick up the moisture.
Critical that the wicking holes are located flush to the bottom surface where they touch the mat and not up where the cup bottom may arch up, though you can make holes there too.
You may want to test before committing to planting the seeds and seedlings.
Missing items: small fan, timer (for lights, fan or both -- or turn on lights in morning and turnoff before going to bed, turn the fan on for few hours each day), plastic utencils (knife, spoon, fork), hand or pump adjustable mist-stream sprayer, turkey baster, labels (cut up window blinds, milk jugs, popsicle sticks etc.) or mark directly on cups with waterproof marker (NOT sharpie -- get the kind call "Garden Marker" or paint marker, or china marking pencil), planting schedule for each kind of plant (when to start seeds, when to start hardening off, when to transplant out in the garden), calendar/journal
