Installation of light box: screw the hanging hole of light box, do not tighten the screw, leave 3-5 thread teeth. After the light box is hung, screw hole is glued, and M4x8 stainless steel screw is used to fix the connecting plate of light box. After all the light boxes are installed, the power lines of the main cabinet and the left and the right auxiliary cabinets are connected to the power lines of the double head lights of the main cabinet through the wiring holes between the cabinets.
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