Not a lot to go on from the information that you have posted unfortunately.
Can't help with the earlier part of your uncle's service or the Bombay area.
No.183 Wing, based at Ridgeway, which I believe was just south of Colombo, Ceylon, controlled all the AMES units in that area. It was formed on 1.1.44 and was disbanded on 31.12.45. AMES stood for Air Ministry Experimental Station, a cover name for radar units. Mount Lavinia, which appears in the September 1945 photo, was the home of No. 524 AMES and was located near RAF Ratmalana, an operational flying base.
There were many trades associated with the operation of an AMES unit so it isn't really possible to say what your uncle might have been doing. Might there be any clues in the photos?
Not much help unfortunately. Your uncle's service record would certainly be a great help if you are able to obtain it.