I searched and searched for info and pictures that showed or told me exactly where/how to insert the feeding tube in the correct hole. I don’t think it’s really possible to see the hole . You just dont want it to go down the hole in the middle that you can actually see when looking into open mouth down the throat. Aim it To the right side of that and as you insert it, you will be able to see it going down toward the crop .( In front of bird.) I looked for weeks thinking there should be a visible hole. Sry this longer than I thought. This is just a tidbit of info I wish I had . Still make sure to read all of the informative posts on here for full instructions .I hope this helps someone.