How to auto drain spa after pool pump run

[spencer25]

I suspect my spa is leaking water. After the pool pump runs for the day, spa looses a lot of water overnight. I always see water spilling on the road mostly due to leakage in my spa.

Is there a way to change the setting so that spa automatically drains water into the pool when the pool pump is off?

Appreciate any help. Thanks!

 

[spencer25]

Adding another photo for reference

 

[ajw22]

What pool or spa drain do you have that puts water in your road?