The Singing Machine iSM-1028 Instruction Manual page 5

Plug the RED connector and WHITE connector into
corresponding colored ports in the correct direction.
Please follow these instructions carefully as the
system will not function/power if connections are not
made properly. Attach the control panel (top) onto
the control base and rotate clockwise.
Warning: Do not remove the connectors with
cable ties.
RED
connector
WHITE
connector
RED
WHITE
E4