"on the link," "in the link," or "at the link"?

From the software point of view, a link is a program within which there are algorithmic routines to process entries made by the user. The instructions to the user about how to make the entries are not visible on the link, which is normally appears as something like this example: Which is the better usage of the following phrase? The instructions are revealed by the internal routines when the link is activated (or "opened" to reveal the instructions).

From this perspective I prefer "Follow the instructions in the link mentioned above."