Hello. Trying to replace rear struts on my 93 Deville has the self leveling control. Dealership said the rear struts had been discontinued. Struts have the electrical connection at top of struts. What are these electrical wire connections there on the front shocks also. What aftermarket struts and shocks can I use I could not find any rear struts that had the electrical connection and do I need it. The back end sags and my compressor runs slot even when engine is off.