Seeding from pre-defined coordinates

Dear MRtrix community,

I will be grateful for your help with the following question. I am interested in seeding streamlines (ideally - using tckgen iFOD2) strictly from pre-defined coordinates which are not tied to the voxel grid (in my specific example - derived from but not representing the coordinates of the vertices of a surface mesh). Is there a way of feeding those data into the algorithm to initiate seeding?

Many thanks,