SUPER MICRO Computer X7SLA-H - Manual (Page 39)

Chapter 2: Installation
2-19
2-7 Jumper Settings
Explanation of Jumpers
To modify the operation of the motherboard, jumpers can be used to choose between
optional settings. Jumpers create shorts between two pins to change the function
of the connector. Pin 1 is identified with a square solder pad on the printed circuit
board.
Note: On two pin jumpers, "Closed" means the jumper is on and "Open" means
the jumper is off the pins.