We taped a wire to avoid the risk of short circuit. The main purpose of the upper chassis is to support the shopping basket. Our initial plan was to design a few hooks to pass through the shopping basket and use latches to secure its connection to the shopping basket. Due to the printing area of the printer, our site area is larger than the area that the printer can print. We divided the chassis into two parts and connected the two parts as shown in the figure below. In order to maintain the overall structural strength in the future we will continue to add supports to reduce stress.
