Hello everyone , this is my scene

I have eight spawn points around my ship and the missile will come randomly from those spawn points.

I have eight sensors around my ship and twelve lunchers on my ship , every time a missile spawn from any spawn point , I use Find Closest to find which sensor is the closest one to the missile.

my problem is when I find out which sensor is the closest one to the missile and store it to the GameObject variable(DecoySensor).How to make lunchers fire depend on the GameObject variable(DecoySensor)??
For example when sensor 8 is the closest one to the missile so I want luncher 1 3 5 to be choose to fire.