Ok bear with me as my wiring expertise is minimal.

I’m fitting an aftermarket low fluid level float switch to the Aluminium expansion tank that I want to trigger a buzzer and led light which are activated via a time delay relay, the trouble I have is that the float switch will only activate in the closed circuit position which is @ tank level full position, is there a way to make the buzzer/led light come on when in the “open circuit / broken circuit” position which will be when the float switch arm is in the down position (tank empty)

I know there’s probably a really easy way but unfortunately my brain can’t work it out!

This is how I’ve done it but probably totally wrong.