Where to put object mappings (in RestKIt)

Question

As I don't want to hijack another thread here comes my question about mappings.

First read: Where's the best place to put object mappings in RestKit

I'm sure that the answer Blake Waters gave will probable be very correct as he is a much smarter and more experienced guy than I am, but to me logic tells me to put the mapping in each model: if you change something in your model, you're just a scroll away to change your mappings.

In my AppDelegate I would then just call the initMappings (or whatever you want to call it) in each of my models.