Did you think to put your cards in Yu-Gi-Oh! card sleeves? And then what? Where do you put them now? There's no place inside box except for this tuckboxes that fit jut inside the box, keeping the original insert, while the cards are well protected inside those sleeves. Just print this PDF and cut along the edges and use double sided tape (I worked this to be the best method but YMMV) to put it all together.