Change Location of SM?

We have some smaller sites that are fed from a 450 AP as a sub.  Then we repeat or put epmp's up that the smaller location. 

We have the repeater site as a geographic site with it's own AP and customers.  However we cannot directly assign the repeater feed to that location as well.  It demands to be put under the main tower its AP is located on in. 

To Illustrate:

Location A                          Location B

Tower A -->  AP1 --> Tower B --> SM at Repeater Site (fed from TowerA)  --> AP2 etc

Problem is I can't put the SM in cnMaestro at Location B manually.  Its forced to attached to Location A