Pioneer ODR PREMIER RS-A1 Owner's Manual page 17

Connecting the Units
Re
4S
Connecting the speaker terminal
ved
Put the short-circuit protection cover (large) around the speaker
leads.
+ Be sure to use this cover to prevent short-circuit.
Short-circuit protection
cover (large)
2. Connect the speaker leads to the speaker terminal.
+ Fasten the speaker leads firmly with terminal screws.
Terminal screw
/
Speaker OUTPUT SK
terminal
3. Cover the entire terminal with the short-circuit protection cover
(large).
Short-circuit protection
cover (large)
20