Set up a runway

I have created a small GA airfield using the the SDK and think that I have a problem with the way I set up the single runway 05/23.

In the runway taxi path properties there is an entry near the end labelled

“Linked to runway: 05-NONE”.

Does this mean that runway 23 is not linked to the taxi path and if so can someone please provide a link to instructions to properly set it up?