How to create a login node?

I have the PBS server, and a bunch of nodes.

We already have two login nodes, but I want to add another running Open On Demand.

I can’t see anything obvious in the Documentation (using the PBS Big Book 19.2.3)

EDIT for clarity:

We have two nodes that users can login to and from which they can submit jobs. The head node/job scheduler/management node is a third node on which users do not have login access.

I would like to add another submit/login node. Are there any special steps required?

This can be closed/deleted. Install the software and then edit /etc/pbs.conf