KickOff.com has been told that Mpontshane will be amongst the new players that Highlands will announce on Monday at a press conference to be held just before their first training session.
Mpontshane has largely been a backup option since arriving at Pirates at the beginning of last year from Platinum Stars three months after the passing away of Senzo Meyiwa.
Such have been his difficulties that he has actually fallen behind Equatorial Guinea international Felipe Ovono and first-choice keeper Brighton Mhlongo.
The 30-year-old has apparently made known to Bucs that he would gladly take the option of being allowed to move on to another club, and though Maritzburg United also raised a hand of interest it is Highlands Park that have won the race for his signature.
Mpontshane worked under Highlands coach Allan Freese when the two were at Platinum Stars during the season when Dikwena went on to win the MTN8 and Telkom Knockout in 2013.
Highlands have already confirmed that they will resume training on Monday at their base in Balfour Park.
The club also already signed Zimbabwean defender Augustine Mbara and Namibian forward Hendrik Somaeb, while their chase for reigning PSL top scorer Collins Mbesuma remains alive though they are facing competition from Bloemfontein Celtic.