Missing Relay...

I was looking in my fusebox today and noticed there is no "ABS T/T Relay Export" plugged in where the diagram shows.

What does this do, and should I take the time to find it and fix it?

Thanks!

(1998 GMC Safari)

ABS stands for Anti-lock Break System, I have no clue what the T/T stands for.

It is only used in Europe or some other continent since it says "Export" it propbably is not even terminated in your application - not wired- just labeled