How to link newly created page to help NAV help topic.

Hi Member.

I have created new customized Page(for Instance 99009510) in Nav 2016 & related help file (T_3021.htm) for user to understand purpose of page. T_3021.htm is already link to ToC file.

i wants to automatically open T_3021.htm file when user click ? blue over new page that 99009510. As shown in below image.




Please any one can advise me how can i achieve this.

Thank you.