Anyway, simply plugging the Chinese name (南華冷房大廈) seen in one of the grabs revealed the location. The road that runs by the warehouse is Wah Sing Street.
Looking down from the top of Wah Sing Street
You can see the Streetview grab below. The angle isn't great but it's nice to see that the vertical sign has managed to survive 45+ years (even if it's looking done for).
In one of those geographical conundrums, one scene later in the film has Fuchsberger heading to his friend's office (see below) with the warehouse clearly visible in the background. He is disturbed by the bad guys and what ensues is a chase over the roof tops of Tsim Sha Tsui!