That's probably just the default, you can set it up with any port you want using the --port flag on the remote side.

ie.
holesail --connect biglongkey --port 9988

What the port is on the other machine doesn't matter, although I will often keep it the same so its easy to know which is which (until naming comes to the manager). 

So if the pinokio tool is running 7860 on the "server" machine (my linux), then ill connect and put it on the same port for the remote machine (macbook). But the computers aren't talking over that port, its simply the local "door" that the service is accessible on when you open it on your computer.

Hope that helps