Asus TS300-E8-PS4 - Manual (Page 70)

Chapter 4: Motherboard information 4-14
6. LAN34_LED connector (5-1 pin LAN34_LED1)
These leads are for Gigabit LAN activity LEDs on the front panel. Connect the
LAN LED cable to the backplane for LAN activity indication.
7. Parallel port connector (26-1 pin LPT1)
This connector is for the parallel port. Connect the parallel port module cable
to this connector, then install the module to a slot opening at the back of the
system chassis.