how do i link menu options to a button?

hello, so today i decided to start trying to make a simple game to work my way up, however i got a little confused, so im using citybuilder tool to help me along my way till i get use to how its all done ect,

in this tools i have made a button witch is now sat on my scene in the list on my left i see list of names like uidrawpathpanel so i assume that will let me draw a path so how would i vet the uidrawpanel to link up with my button, so when some one clicks it they get to build a path

if i click uidrawpathpanel and then click contents i have a file called pathclicklistener and 01donebutton

how can i set it up so when people click the button they can place paths and save it im confused how to link it up, anyone willing to help me out plzz