Prepare two instances of the viewer (one for Syriac, one for Arabic + Karshuni)

On the Ahiqar website we want to display two viewer instances: One for the Syriac collation and one for the Arabic and Karshuni texts.

While the Syriac collection works out of the box, we have to find a solution back-end-wise to make the Arabic and the Karshuni collections available on one endpoint.