As earlier revealed by KickOff.com, the Lions of the North have sealed a deal with Sekola, who will join the Gauteng-based club at the end of the season from Free State Stars.
The 27-year-old has managed just a single goal so far this season, which came during their 3-1 Telkom Knockout thrashing of Bidvest Wits back in October last year.
Coach Gordon Igesund has also landed the services of wing-back Nhlapo, who will join the club immediately on loan from the Clever Boys.
The former Jomo Cosmos defender has been reduced to just one start and two substitute appearances under Gavin Hunt this season, particularly due to the consistency of Nazier Allie and the arrival of Siboniso Gaxa.
Meanwhile, as indicated by this website, the club confirmed that Augustine Leonard has been transfer listed, along with defender Teboho Kalake and midfielders Simphiwe Tshabalala and Thapelo Mathibe.
A further update revealed that midfielder Sandile Kwela as well as strike duo Collins Mbesuma and Peter Shalulile have recovered from their respective injuries.
Highlands, who are currently second from bottom after 15 games, will resume their maiden top flight league campaign on February 7, when they visit high-flying Cape Town City.