How can I upload vector on Adobe Stock via Xpiks FTP?

Hi there,

I am currently using Xpiks FTP software. I can easily submit my vectors to another website via this software.

But I can't upload vector at Adobe Stock via this software.

The file doesn't show off in the uploaded file area.

As we need a preview image for vector, but I can't figure out how to link the image with the vector in Xpiks FTP.

I hope that any user or Adobe official will help me. 

I have added the software interface for better understanding.

Thanks.