I haven't connected Service Now directly with Anaplan but it seems like it would be a simple task if you're willing to use the RESTful APIs. While you can certainly use Anaplan Connect, you'll need a way to also obtain the Service Now data using their APIs. Candidly, I prefer Python for this but you can use any programming language or ETL tool that can POST and GET.
As a bonus with Python, you can also use Beautiful Soup library, in case you don't have access to the Service Now API's. This library will allow you scrape the webpage for the information you need. Very fast!