A 0-0 result to mirror the deadlock in San Pedro Sula on Saturday will send Australia and Honduras to extra-time, and then possibly a shootout at ANZ Stadium in the second leg of their qualifying playoff.
But on the eve of the make-or-break clash, Jedinak wasn't overly interested in what may be 120 minutes into the distance.
"If I'm on the pitch at the time I'll put my hand up (but) I don't know how it works," he said.
"I know usually sometimes boys offer to put their hand up; who's feeling comfortable and confident at the time is usually how it goes.
"Sometimes you might be told to take them."
Jedinak is Australia's first-choice penalty taker, scoring twice from the spot against Thailand in a 2-2 draw last November and in Melbourne against Japan to force a 1-1 draw.
His curious indecision was a stark contrast to Australia's ready-for-anything routine that usually accompanies their preparations.
That could be because Plan A is to win and win inside 90 minutes.
Coach Ange Postecoglou confirmed his attacking game plan would get another airing in Sydney.
"We're going to start aggressively," he said.
"As long as the game goes, 90 minutes, 120 minutes, we'll keep going at the same level.
"We've never sat back after scoring and we've never changed anything when we've conceded.
"It's up to the opposition to try and stop us and keep up with us."
Jedinak concluded that spot kicks wouldn't faze his team.
"If it gets to that, whoever is going to be chosen will be ready," he said.
Fresh off a strong performance in Honduras, Australia's inspirational skipper said he would be fine to start in Sydney should Postecoglou select him.
Saturday's game was Jedinak's first 90-minute appearance in five months.
The 33-year-old said the high-tech around-the-clock recovery program had him on track to back up.
"It was great to get the minutes and see the game through ... after that it was all about recovering and recuperating," he said.