The Seventh Sin - Eleanor Parker (1957) - Connaught Road, Central

It's a bit blurry, but there is a scene whereby Carol and Walter head to the docks in a car in order to catch the boat to their rural destination. The scene is a mix of on-location footage that doesn't show the actors faces, and then a face shot (of Eleanor Parker, as she turns to camera) using a back projection of the same footage. The location itself was next to the pier where the Alexander Grantham Fireboat was based. I believe this was at the Government pier on the waterfront where Wing Wo Street meets Connaught Road.

These first two images show the Govt pier and the fireboat moored there

The car stops just past the Govt pier and "Carol" walks to the waterfront.
Of course, this was a stand-in for Eleanor Parker, who wasn't in HK.

This next shot uses back projection as Eleanor Parker turns to camera.

Back to the stand-in as Carol walks to board the boat

Following the boarding of their transport, the next bit of footage shows the boat as it pulls away from the waterfront. This is still the area between the old Govt pier (behind camera) and the longer "Custodian Wharf" that can be seen in the background. This was once the Osaka Shosen Kaisha pier but, I believe, was taken into possession by the HK Govt following the defeat of Japan in WW2.    

We finish with a final shot of Carol (Eleanor Parker) on board the boat transport as she ponders her life. Again, Parker wasn't in Hong Kong and this was a back projected studio scene. The big building behind Parker's head was the Central Fire Station.