Epson 1500 - Manual (Page 159)

6. Insert the interface cable(s) into the U-shaped part of one
cable clip. Lift the left side of the printer up slightly. Then
hook the short lip of the clip into the forward slot and push
the bottom of the clip under the printer until it clicks in
place. Repeat this procedure with the second clip and insert
it into the back slot.
7. Be sure the power is turned off; then plug the power cord
into an electrical outlet.
Options 5-45