Seagate BARRACUDA 4 Family Installation Manual page 49

Barracuda 4 Installation Guide, Rev. E 47
Connecting remote LEDs
Remote LED connections are provided on the J4 con-
nector (see Figure 21). You can connect 2-pin remote
LEDs using these connections. Attach the (-) lead to the
appropriate pin and then attach the (+) lead to the pin
labelled +5V.