Abubakar joined the National First Division club in January from Free State Stars when his former coach at Black Leopards Jean Francois Loscuito was at the helm.
The Ghanaian originally came to South Africa in 2012 when he linked up with Sundowns from New Edubiase. However, he never played a game for the eight-time league champions and was twice loaned to Leopards before they signed him outright in 2016.
Abubakar then moved to Stars at the beginning of last season, but only started one match and made two substitute appearances before being shipped out to Richards Bay.
He was transfer-listed on his return to Ea Lla Koto in the off-season along with former Orlando Pirates and Chippa United midfielder Sello Japhta.
Meanwhile, Sekese was on loan at the second-tier outfit from Bidvest Wits.
"Abu has been signed," Richards Bay coach Brandon Truter tells KickOff.com.
"Taariq Bernard and he [Sekese] were on loan from Wits last season and he’s now outright our player.”
Aside from the duo, the club have also signed Tshepo Mashigo from Swallows FC, Sandile Kubheka and Siyanda Ngubo from Royal Eagles, and Mpho Erasmus from Mthatha Bucks.
Richards Bay reached the final of the KZN Premier's Cup on the weekend, going down 1-0 to AmaZulu. They beat Royal Eagles 4-2 on penalties in the quarter-finals after fighting back to earn a 2-2 draw in regular action. They then edged topflight side Golden Arrows 4-3 on penalties in the semi-finals after a barren stalemate.
Truter, who joined the club in the off-season after leaving Cape Town All Stars, was pleased with their showing in the pre-season tournament.
“It was taxing on the players,” Truter says.
“This last 90 minutes, this final, now I knew we were going to crash somewhere about the 60th or 70th-minute mark, and it happened.
“I think the other 60 minutes, 70 minutes we dominated. At one stage AmaZulu were chasing shadows. We created very good chances to equalise and even to take the lead, but the format and the draw suited AmaZulu [because they had a bye in the first game].
“But otherwise it was a good tournament for us and a good tournament for KZN.”