Epson 7500 - Manual (Page 21)

5
Connecting the Keyboard
To connect the keyboard, hold the cable connector so the arrow
on the connector faces Insert it into the port marked K/B, as
shown below.
I
I
I
II
Caution
Although the connectors and ports for the keyboard and
mouse are physically identical, they cannot be used
interchangeably. Be sure to plug the keyboard connector into
the keyboard (K/B) port.
1-10 Setting Up Your System