After the break Maswanganyi doubled the deficit when he turned his marker inside out with sweet trickery before burying a low shot past Bamba.
The defeat under the Orlando floodlights condemned them to remain rooted at the bottom of the four-team table with a single point to their name. They tried to make a fight of it second stanza but their efforts were reduced to long-range shots which hardly troubled Pirates goalminder Sipho Chaine.
Though he will be pleased with the result, Pirates coach Jose Riveiro must demand a better conversion rate from his charges as they are likely to pay a heavy price against better-organised opposition in the latter stages of the tournament.
The damage could have been greater had the hosts been ruthless as plenty of chances went begging.
With the score goalless in the early stages, Pirates came close to profiting when Mofokeng let loose a left-footed shot but watched in agony as it narrowly missed the target.
Another effort from Kabelo Dlamini, a curling shot from outside the box, was directed straight at Bamba.
Mohau Nkota’s vicious shot followed the same script and later the youngster was a bit greedy when he went for goal when laying off a pass for two unmarked teammates seemed a better option.
Pirates will next play Belouizdad on January 12 at Orlando Stadium.