Question : windows domain dns settings

Hi all,
I have 2 locations; A and B.  Location A has my PDC and location B has another DC.  How should I have my DNS settings?  Right now I have it setup where location A PDC points to its self and the location A clients point to the PDC in location A.  At location B I have the DC pointing to location A's PDC and the location B clients point to the DC in location B.
Please verify...

Answer : windows domain dns settings

Both serve the same domain?

If yes,  yes yours is the preferred setup.