Arthur found a reference to the shop being on Reclamation Street but no mention of specifics, however, the curve of the street that is obvious from the film can only be found on one particular section of the road and it is the section between Kansu Street and Public Square Street.
We've actually seen this section of Kowloon before, although it was several years later by which time the block with the yellow corner shop had been completely razed and flattened leaving open space. In case you need reminding here is the other film shot I am talking about. It's one of the opening credit scenes from Enter The Dragon.
The empty space in the front of the Enter the Dragon screen shot is where the block with the yellow shop used to stand, and the old decrepit block with the wooden poles holding it up can be seen on the very left of the first Sumuru screencap above - in fact it was even being held up by wooden struts back then! These days the old decrepit block has been replaced by the YMT Jade Hawker bazaar and the empty space now holds one of the upright supports for the West Kowloon Corridor flyover.