Ok, I called godaddy support trying to get any help that I could get. They told me to create an addon domain for lancabletesters.net.
So now, handheldtesting.com/lancabletesters and lancabletesters.net are pointing to the same place.
I added the site handheldtesting.com/lancabletesters into multisite, then went into mapping and added site id = 3, which is what the id of that subdomain is, and added https://lancabletester.net/ as “Domain”.
Nothing is coming up yet, other than an index page on both the subdomain and the .net.
Not sure what I am doing wrong, any help is appreciated.
Thanks,
Ken