Transmission leak from shifter connector

I dont know what this part is called. Its from the shift linkage to the transmission but there is tranny fluid leaking from it. What I am looking for is what is the seal called that I need to replace and is there a thread to where I can follo the instructions for it? I do not know what hat small section/boot is called or if there is a gasket or seal behind it.

shift shaft seal

Thank you sir. Is there a guide on here that shows how to replace this? Or is this a common sense job?