I want to custom update the SNMP-SERVER LOCATION field on approx., 1000 switches. However the field is different on per switch(es) basis. Some offices have 1 switch, some offices have 2-4 switches. How can I do this with cattools?

I am currently able to do this with 1-4 switches because those 1-4 switches are at the same location. 

For example 4 switches in PLANO, 2 Switches in MIAMI, etc.. that SNMP-SERVER Location field = PLANO for the 4, and = MIAMI for the 2 in Miami.

Any help would be appreicated.