Shooting Stars are now on 51 points, only four points adrift of leaders Dolphins in the standings, after 28 matches of the season.
Two teams will be promoted from this section, while another two will make it to the top flight from the Northern group, currently led by Kwara United.
The Ibadan club, who were the first Nigerian club to win a major international honour in 1976, were relegated from the top division three years ago.
"Both teams deserve to be in the top league because they play good football and have a rich history behind them, " said Dolphins coach, Stanley Eguma, after Saturday's clash.
Shooting Stars are now managed by former international star, Mutiu Adepoju, who featured for several Spanish clubs including Racing Santander and Real Sociedad.
In front of over 10,000 fans at the Adamasingba Stadium in Ibadan, Shooting Stars took the lead after just six minutes through Adigun Lateef. Dolphins drew level 20 minutes later, courtesy of a strike by Abduljeleel Ajagun, before Meshck Chukubukem netted the match winner in the 35th minute.
The home team would have increased their lead five minutes from time but Akeem Adebisi's penalty kick was saved by the Dolphins goalkeeper.
Samm Audu, Goal.com