Read carefully. Instructions are a little outdated i think, s as you can more use REST URI and don't need to include the certificate, just the macaroon
Discussion
All of the information you need to set it up is in your lndconnect URL which will look like this:
lndconnect://xxxxxx.onion:8080?cert=yyyyyy
It helps to use a text editor to separate the elements so you can paste them into the Alby node connect interface. 
