In case of more than one place of business, the records are required to be maintained only at principal place of business

No, in case of additional places of business, the accounts relating to each place of business shall be kept at such places of business concerned (provided such place is specified in the certificate of registration) such books of account shall include any electronic form of data stored on any electronic device.

(ICAI FAQ PUBLICATIONS 06-09-2017 ACCOUNTS AND RECORDS: FAQ NO. 8)