Larne secured their spot in Friday's European play-offs final after a two-goal home defeat of Coleraine.
Tiernan Lynch's side might have raced into the lead after Mark Randall got free to connect to a throw-in and test Martin Gallagher with a half volley that was tipped onto the crossbar.
The opener came from the corner that followed on 12 minutes after Kofi Balmer got his head to Randall's delivery but, as the ball seemed to be going wide, it came off the unfortunate Rodney Brown and into his own net.
And Randall almost bagged Larne's second as the home side continued to dominate when, after a good run into the box, he saw his goal bound effort blocked by Stephen O'Donnell.
Further efforts came through Tomas Cosgrove after his back post header was cleared off the line while Ben Doherty saw a left-foot shot gathered by the Coleraine keeper.
The sides traded chances early in the second half as David McDaid sent an effort off target while, for Coleraine, Jamie Glackin sent a curling shot the wrong side of the post.
Needing to equalise, Coleraine began to enjoy longer periods of possession and almost levelled through Stephen Lowry after he ran into the box only to clip the outside of an upright.
However Larne held on and made sure of meeting Glentoran on Friday night after Randall finally got his name on the scoresheet deep into stoppage time after taking the ball past Gallagher and into the empty net.
Larne: Ferguson, Balmer, Kelly, Sule, Randall, McDaid, Doherty, Lynch, Bolger, Bonis, Cosgrove subs Devlin (not used), Herron (not used), Hale (not used), Scott (replaced McDaid 68), Mitchell (replaced Lynch 86), Jarvis (replaced Doherty 86), Lusty (not used)
Coleraine: Gallagher, Kane, Mullan, Brown, J. McLaughlin, Bradley, Carson, O'Donnell, Glackin, Kelly subs Henderson (not used), Jarvis (replaced Brown 52), Wilson (replaced Kelly 78), Allen (replaced Mullan 86), Shevlin (replaced J. McLaughlin 52), K. McLaughlin (not used), Tosh (not used)