Okay @DickBrazen

What @BagelPlane said, on the build page, under the same little arrow that allows you to edit the build intro, is the option to 'Publish'

Click the little down arrow in the corner and then click publish.

What page?
@Blaze77gunYT

@Embo but i want to upload from the page

Right below the download button, above the desc
@Blaze77gunYT

@Cyan where is it?

You mean from an unliated post?
Click the triangle button (its small, look for it) and click Publish