Base Support PLS Help

hi, I know almost nothing about how this technical part of wordpress works and not even how to upload files through this plugin, I have an .obj file that I would like to show in a product of your choice on my site, is it possible to understand where to upload it? Why is there the short code that I think I understand you have to put it on the product page (?) But where do I load it am the .obj file? They told me that you can also upload with STFP and I use FileZilla but I also don’t know where to upload it, thanks in advance please help me