You are posting this question in the vB4 subforum, so I gather you want to do this in vB4. If the mod's php code is not altered to adapt to vB4, there is no way of showing the variable in the template at this time. In vB4, variables need to be registered to be available in templates.
See this article on what is needed:
https://vborg.vbsupport.ru/showthread.php?p=1915830