How do I upload MATLAB published code as an Explanation tab for my function on the File Exchange?

Hello folks. I am interested in uploading a function I wrote to the File Exchange. On the upload page there is a little link that discussed uploading published code as further documentation for your file, but I have yet to figure out how to do this.

What I would like is to upload my function file, and also upload my published html (or whatever is necessary) as an Explanation tab like I have seen in other files on the Exchange. Could you help me do this? Thank you!