Apartment car parking registration in Sale Deed

Hi, I recently purchased a flat in Bangalore from one of the A grade builder.I have been allotted TWO covered car parking (default+additionally bought).I have received the allotment letter from builder stating the total number and car parking location numbers. Now i am about to execute the sale deed.The sale deed only mentions the total number of covered parking i.e. TWO but not the exact parking location numbers.My questions are 1) Is the current mention(allotment letter + sale deed only with total parking number sufficient to claim my rights over the allotted parking or exact parking numbers should be mentioned in Sale deed? 2) Mentioning the exact parking number in sale deed legally binding or provides assurance that i can retain the parking forever and can not be challenged by society member association(already formed)? 3)In late future e.g. 15 years if the parking numbers change or relocated by the association how that can be handled in sale deed(when exact numbers are mentioned