Need help identifying a part

After my last trip the wire that connects to my battery broke off. It was connected to the part below (behind it, not the wires in the picture that are still attached). I am not sure what its called, but I think I need a new one. Does anyone know what it’s called or have any advice?

I moved you in here......

This is a place you can go to get all your questions answered about your bike....

It appears to be a voltage rectifier/regulator but someone who knows more about Honda's may know better.
What year is your 400EX?

That is a rectifier/regulator, the new one will not come with the wiring harness. It will be everything in front of the plug(just the one unit).

voltage regulator. go to a site like procaliber.com- they have parts catalogs and price lists there- you can verify it and price it too.