The power receptacle at the bottom of the LectroFan has a rectangular-shaped indentation next to it. It matches the shape of the connector on the power cable, and when you connect the cable you should rotate it so that it “snaps” into place into the rectangular indentation next to it. If it’s not placed into this indentation, you may have issues with the cable disconnecting, causing your LectroFan to lose power.
Your LectroFan also has one or two cable guides on the bottom, depending on the date of manufacture. You can thread the power cable through these guides to help keep the cable secure.