The print profile has a pause in it to insert magnets. I used these https://www.amazon.com/dp/B0CPP2D631?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1. it is 2 magnets per display box. They will need to be pressed in and a tight fit. Otherwise the magnets may come out and stick to the print head. By making them snug it removed the need for glue.