Front panel female jacks, described left to right:
DI Input 1
DI Input 2
Headphones 1
Headphones 2

Top Panel, starting from bottom left:
Cluster of 12 switches, listed left to right, bottom row first then moving upward:
High Pass 1 through 4 left to right, left is off
10dB Pad 1 through 4, left is off
48V Phantom Power 1 through 4, left is off
Knobs above cluster of switches are input gains 1 through 4 from left to right

Large volume knob (use this as the central point of orientation to navigate the right side of the top panel):
3 buttons below are ID, Dim and Cut from left to right
4 buttons to the right are TalkBack, F3, F2 and F1 moving upward vertically
2 knobs above are headphones volumes, 1 on left, 2 on right

Back panel, looking over the top of the interface, starting on left:
Mic/Line input 1 combi-jack
Vertical jacks are Insert Send and Return for input 1, Send is topmost
Mic/Line Input 2 combi-jack
Vertical jacks are Insert Send and Return for input 2, Send is topmost
Mic/Line Input 3 combi-jack
Mic/Line Input 4 combi-jack
Vertical jacks for Line Out 1 and 2, 1L is topmost
Vertical jacks for Line Out 3 and 4, 3L is topmost
Word Clock output (big pointy connector)
Vertical Optical sockets, 1 in is bottom, 1 out is top
Vertical Optical sockets, 2 in is bottom, 2 out is top
USBC female connector is underneath the power switch
Power switch, up is on
DC Power connector
Kensington lock is on right side of unit, toward the back