Walk out of the airport terminal towards the bus terminus. Once you get there, start walking to the left and the kiosk will be located there. You won't be able to see it in the distance as you are walking out of the airport terminal as the kiosk is essentially built into the Airport Express' building but once you start walking to the left once you've reached the bus terminus, you will see it.

https://www.google.com/maps/place/22...7!4d113.936982