>>6251154Those two visible gray o-clips are just to hold the bottom plates in place and hide all the snot shit underneath.
The front grille has four black o-clips in a row that make up the front snot connection, but pretty much everything is built off of this single gray o-clip. It's all snugly self-connected, so even though it wouldn't pass inspection as an official set because juggling all the pieces into place would be tough for a little kid, the final product is really sturdy.