I had the surprise to find today a well designed facility in Saiun Cloud, Shikoku system.
The facility used a Golden Chrysanthemum transponder and already has some defenses set up. It shouldn't be a problem for the South Quadrant fleet though.
I suggest repositioning 3rd Destroyers squadron to Shikoku system to deal with this facility without delay, granted the truce with House Rheinland materializes.