i keep hitting the detonator early - please change the interface

1 in 8 or so expeditions i hit the detonator early using mouse movement to move around the area to plant the explosives. it would so much better if there was a confirm button after you hit it or you needed to do literally anything other than just click on it casually.

maybe a 5 second fuse where if you click the detonator again it stops it?

i realize this is a skill issue. i'm sorry. please save me from myself.