The Stereo Mastering Compressor uses two module slots. From behind, the left stereo channel is on the right connector set and the left stereo channel is on the left connector set.

INPUT b/right:
Side Chain Insert Input right

INPUT b/left:
Side Chain Insert Input left

OUTPUT a/left:
Stereo Mastering
Compressor
Output left

OUTPUT a/right:
Stereo Mastering
Compressor
Output right

INPUT a/left:
Stereo Mastering
Compressor
Input left

INPUT a/right:
Stereo Mastering
Compressor
Input right

OUTPUT b/right:
Side Chain Insert Output right

OUTPUT b/left:
Side Chain Insert Output left