Anyway, here is one from Nathan Road in Mongkok that clearly shows a neon sign advertising the South China Theatre. It also happens to be one of the location seen in the red-coloured opening credits with Gordon Jackson's face superimposed over the top.
A quick look on the trusty Cinema Treasures website reveals that the South China Theatre was situated at 174 Portland St in Mongkok (the next road over). So this view is facing north and is where Soy Street intersects with Nathan Rd. Here is the current Streetview. Notice that the Crocodile shop was replaced by...surprise surprise...a jewelers.
The cinema, by the way, closed down in 2005 and was replaced by a short-lived mall called Tokyo Town.