Where do posties wee?

A Postie came to my work today and rang the front doorbell. By the time someone got to the door, the Postie had disappeared between the two open back doors of the van, leaving only his legs and pee stream to be seen from front door.

Given there are children on site, the Postie must have been really desperate!

This got me thinking, where do Posties pee when they are out on deliveries?