API create annotations without intersection

Hello, I’m using the Data and Viewer API in order to create annotations. I’m creating my models programmatically, using a python script and astronomical data. Then uploading them via the Data API.
Unfortunately, I don’t know in advance any model face to intersect with the ray casted in createAnnotation().
So, has anyone ever tried uploading a dummy transparent object whose sole purpose is to ensure an hotspot at the intersection of a casted ray?

Hi, indeed current viewer api indeed need something to intersect with.

you can add small cubes at those plase, and then hide them using viewer api ?
( Viewer API - Functions - Sketchfab )