As I recall, the California application does not allow you to list preferences for testing locations. I think the Board normally assigns you to the nearest testing location by default.
But I'll bet that they would be willing to switch your location, as long you don't make the request at the last minute. Call them and ask.
You should make the request as early in the process as possible. I would attach a cover letter with your initial application, specifically requesting the test location that you want. Once your eligibility has been confirmed, then follow up with a call or email, to see if they honored your request. Don't wait for the official exam admittance letter, as you probably won't receive it until shortly before the test date; it may then be too late to make any changes.