M Box 2 to 003 help

[PDX Jake]

I have been using an Mbox 2 with Pro Tools LE 7.3 for a long time and recently bought a 003 Rack with Pro Tools LE 8 for the extra inputs.

My Mbox 2 has a front panel knob "Mix" that allows me to adjust the mix between in the inputs and outputs through the monitors. I turn it one way and hear raw input and the other way to only hear the output signal.

I usually have this set in the middle so I can monitor both. I cannot find this knob on my 003 and want to know if there is a way to hear the raw input signal on a 003 Rack??