what do i do with number 8 GND , I am using copy chrome kit don’t i just use + and – ?

[IMG][/IMG]

􀁣 Power Switch :
Turns the power supply on–off, when it is on the front display lights up.
􀁤 AC Input Socket with Fuse
􀁥 Concealed Fuse box ( ply open the cover to get to the fuse)
􀁦 Output Voltage Tuning knob
􀁧 Output Current Tuning knob.
􀁨 Output On/Off push button
􀁩 Output Terminal Positive (+) Red color.
􀁪 GND Terminal () Green color
Chassis ground terminal, normally this is to be short to (+) or (-) as required by user.
􀁫 Output Terminal Negative (-) Black color.
􀁬 LCD Display panel showing :
4 digit voltage, current meter, (CV) constant voltage mode, (CC) constant current mode,
Output Terminal on/off state
OPERATIONS
Ground Connection