Having gone three games without a win, Shadrach Aseigbo scored from the spot at the death to help the Umuahia based side to pip the Peace Boys for maximum points.
And the former Niger Tornadoes gaffer insists his side's winning ways return to help them regain their lost mentality and improve their position on the log.
"I was not an easy win for us but at the end of the say we got the three points," Biffo told Goal.
"It was a great relieved for us, though we got the winning goal late it is better to win late than never.
"One thing that is helping the team [Plateau United] is luck and motivation to play with relax mind because we have not won in our last few games.
"But my players were very anxious to win playing with more determination and without pressure. We needed the win to gain our confidence back and I think we deserved the three points.
"Before then, we had the game under control except for the moment my boys thought the game was over and they scored from a long throw-in.
"That is their biggest advantage but we had our chances and they had theirs too but in all we were truly deserving of the win.
"We tried our best to stop them from the throw-ins not to cause us any havoc but I must still give kudos to them after the 1-1 draw.
"They came all out against us hoping they could get a late victory and their attacking move saw them exposed at the back to concede a late penalty that gave us the victory.
"It was a vital win for us after we've not been able to get results in our recent matches. I believe the victory will bring back my players winning mentality and composure ahead of our next games."