A/C Compressor is ready to put it all back together, where do the expansion valve and O-rings go?

The O rings go on the end of each hose and in the A/C compressor. Here are guides to help us see how to reinstall the compressor. There is not expansion valve, instead they use an orifice tube which you can remove and clean. Here is the location of the tube and how to replace the AC compressor which the image shows where the O ring goes. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car. The orifice tube must be cleaned before installing the new compressor.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://youtu.be/4EqdrBVb0sY?si=_CHver0nOjYIcXF7

Check out the images (below). Please let us know if you need anything else to get the problem fixed.