Hello. Thanks for the pics. Box looks good. Internally and externally. Which is really good because it's still intact. Wait for the replacement compressor to arrive and it will arrive with it's own black compressor relay. It will not be green. When you reconnect everything, make sure the battery is disconnected, for obvious reasons. At that point, at the end, reconnect the battery, and cycle the car and let it start. The rest should be automatic. Clean and spray a little WD40 onto your level sensors, on to the arms. FYI, if your ordered the valve box for the airlines, DON'T replace the original brass fittings at the end of the lines. The original should be still good. Don't over tighten, just enough.
In my case, it was the box that failed and I had to replace the compressor, valve box, and front struts on the vehicle. GL.