how do I link in admin-plugin

I’m writing a plugin, but how do I link to my own class-functions without using add_submenu_page(…)? I have a class and all add_submenu_page links fine, I can load and save stuff etc. But from from some functions I’d like to link to others which are not in the menu – how do I do that ?

class myPlugin  {
 function menu(){
  add_submenu_page(...,array('myPlugin','menuFunction1'));
 }

 function menuFunction1(){
  echo '<a href="/how-do-I-link-to-this-function" >link</a>';
 }

 function how-do-I-link-to-this-function(){
  ...;
 }
}

hope it makes sense ?

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