Racks with switchboards. The tall one at the left houses the monitor and the laparoscope (small units on the shelf at the top). The rack to the right houses the insufflator (middle shelf) and the diathermy unit (top shelf). The UPS batteries can be seen behind this rack. Each rack has its own switchboard (brown boxes) with five combination plugs with individual fuses and switches. They are connected to the UPS output power bus on the wall. The CO₂ cylinder for insufflation can be seen in the second picture.