Course Register button for not-logged-in filter

Hello,

On my course page on the sidebar, I use output_course_enrolment_actions() function in order to show enrolment status.
If i’m not logged in I see a “Register” button and I would like to redirect that register to a custom landing page for registering and selling my courses.
Why? I would like to sell a subscription to my website which includes some products and courses.

I was looking into that function code and it looks like lines 3026 and 3027 are performing the action of printing that button, it would be nice if there was some sort of filter I could use in order to change that redirect link and button text, as of now I have to edit the plugin files or write my own enrollment function.

If there is any other way I could achieve this please tell ??

Thanks!