Yes, you are correct with the hookup but keep a few things in mind.
Once you mix to the 22-2 throught the dbx, you must ALWAYS have possession of the dbx when you listen back to those tapes..ie:...you must never lose the dbx, it must never break, it must always be hooked up and working...ie: ie:..the reel of tape can not be played on the 22-2 or any other machine UNLESS the dbx is there and working. If you Play the tape WITHOUT the dbx, it will sound...strange...and bad. Once you do the hookup and try a test recording, listen back with the dbx turned off or out of the path and you'll see exactly what I mean.
Recommendation for future posterity. Make two mixes. One with dbx and one without. Thirty years from now, there's a good chance you'll want to transfer that stuff to some future recording gizmo. It's Murphy's Law that 30 years from now, you'll find a tape recorder, but your dbx will be broken or long gone.
The hookup....
1. Digi 002 outputs 1 and 2 get hooked to dbx "from console"
2. Your console inputs 1-2 (for listening back on your monitors to what you have on tape) get hooked to dbx "to console".
3. The dbx "to machine input" gets hooked to the 22-2 left and right rca input jacks.
4. The 22-2 output rca jacks go to the dbx "from machine output".
In addition, calibrate the dbx to your particular machine ..if the 150 has a calibration routine. i don't remember if
the dbx 150 is a type 1 or type 2 processor.