How do you use Insurance?

Have yet to see something about how you use this.Something tied with auto repair?

Hello

you can turn of the auto repair on your ship and when it gets damage after battle you can use the insurance instead of paying credits.

Alternatively, click on the little wrenches once they are full.

Wrenches always charge to my wallet though. 

Figured it out though. 

Button lights up when repair is needed.

Dur.