VSS -> GND
VDD -> +5v
VEE -> connected to the middle pin of a 3 pin variable resistor... like this: 1st pin +5V... 2nd pin LCD-VEE... 3rd pin GND
RS, RW, E -> the connection depends on your design, per example, with an Arduino, i connect RS and E to Arduino, and RW to GND
D0 to D7 -> again, it depends on your design, you can use 8bit connection or 4bit connection, 4 bit is the most common and you use less pins
15 Led+ -> you can put a 330 ohm resistor in +5v to switch on the light of your LCD
16 Led- -> GND