Index and Link a Pointcloud from a las file

Hi all,
I’m currently working with automated modelling from pointcloud data. As a verification I would like to automate linking in the original pointcloud in the Revit project. This requires 2 steps:
1 index the raw las data into an rcp. I found the following information but can’t get it to work:
EDIT this turned up in a search today:
So, Recap API: has been put behind a paywall. That is a layer of complexity I could do without for the moment… I’ll stick with Revit 2018 then.
2 create a Pointcloud Link, By Shared Coordinates. There seems to be a lot of documentation on how to get info from a linked pointcloud, but I have not been able to find anything on how to create one in the first place. Is it even possible?