Registration of leasing business

my client is owner of 2 commercial spaces in city and he leased all the properties

place 1- one shop

place 2- 5 shops in one structure in which 4 shops are under lease and 1 is not occupied till now

my question is can we write any one place in the principle place of business in GST registration or we have to write all places in additional places of business

And if we have to mention all shops in additional places of business should we write 2 places(place 1 and place 2)
OR
6 places i.e 1 shop is place 1 and 5 shops in place 2

Thanks in advance