OU Level in Config

[PaulCNCS2024]

Can anybody provide me with a bit of clarification/documentation about how the OU setting work in the config. I'm trying to debug an issue where the Location is being reported from a child OU rather than the parent. I've got the following (see below) set as part of my config but i'm unclear if the 'OULevel key' needs to be changed or if there's something else causing this odd location issue.