The Elegoo Mars SLA 3D printer is powered by a USB storage device, and its power interface is located on the back of the body. The bracket is equipped with a USB extension cable, which is fixed to the left side of the printer's casing through the screw holes on the original body.

In addition to the printouts themselves, you only need to prepare the following accessories:

• 2 M3×8 flat-head internal hexagonal screws
• 1 USB extension cable

3-roll USB extension cable
https://www.amazon.com/Cable-Matters-3-Pack-Extension-Extender/dp/B00N9HRTFU/ref=sr_1_5?keywords=cable+matters+usb+extension&qid=1562614217&s=gateway&sr=8-5

When connecting the extension cable to the USB port on the back of the device, make sure to cut off a section of the plastic sheath around the USB extension cable's male connector that is about 5 millimeters long. This will allow the USB port to be inserted deeper into the slot and ensure a secure and reliable connection.