The back panel contains the audio jacks and the Midi ports:
B
ACK PANEL
15 Audio Output Left
16
Audio Output Right
17 Foot Switch
18
Midi In
19 Midi Out/Thru
20
AC adapter jack
21 Power On/Off
22
Expansion Slot 1
23 Expansion Slot 2
10
2. Connections and Commands
L
R
ON
LINE OUT
FOOT
SWITCH
INPUT
OUTPUT
12Vac
IN
MIDI
23
22