A merge of the two photos from https://www.flickr.com/photos/deswhite/11903642015/ and https://www.flickr.com/photos/deswhite/11903640195/
There was a pier off the seawall at the junction with Tin Lok Lane, so that's likely where the photographer stood to get this view looking along the beach:
https://gwulo.com/node/43093#17/22.27823/114.17935/Map_by_ESRI-1905_HK-M...
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Observation Street Wharf
As mentioned here , Observation Place had a stone pier. The pier became a public wharf in 1907. Became disused in 1924 with the construction of the Praya East Reclamation.