What is the best placement for the Suppression Rune for Firebolt Tower

I have been forging my fire bolt tower suppression rune for a while now. So I really have only one chance to use it properly. The question is about the most effective place for a firebolt tower with the suppression rune applied. In the picture below, do u think it will work effectively on a firebolt tower across the barrier? WHen the attacking troops take down this tower across the lane, will they be hit by the suppression rune or does the tower have to be placed INSIDE the lane to work?
I circled the tower to which I want to apply the suppression rune