The pictures show the trim piece removed for better visibility of how it should hook onto the lip behind the handle lever. Removing the top trim piece isn’t necessary. After connecting the two parts, simply slide it up, then slide it down until it sits flush against the inner wall, hooks onto the lip, and aligns with the edges. You’ll need to use Bambu Lab Studio to add text and customize the colors. 

***** When adding your text, be sure not to extend it past the upper border line I included, that upper area will be covered by the handle.