What is this electrical connection?

[AC91GT]

I was cleaning my MAF sensor last night and noticed in the wiring harness bundle that one of my connectors was undone. It is a plug that points down and looks like it goes to something mounted under the alternator. I cleaned the conectors real good and put it back together. Problem is now my car won't start. Turn the key and I get the fuel pump and the normal idiot lights on the dash then nothing. I did have the battery disconnected while i cleaned the MAF. Car is currently being charged. So what is this plug and could it be causing my issue? Also can I just disconnect? Thanks.

 

[PUNISHER RACING]

then unplug it!

 

[AC91GT]

If it still won't start I will definitely unplug. However it does not answer the question "what is it"? Thanks anyway

 

[PUNISHER RACING]

post a pic of the connector most of us have seen em enough we can name them in our sleep

 

[Funanin]

true. try to take a picture of it.