Transfer deadline day represents the final chance for Wilson, who has already agreed a pre-contract deal with Celtic, to join the Bhoys before the summer.
Lennon, whose side hammered Aberdeen at the weekend to reach the Scottish League Cup final, is in desperate need of a central defender after a spate of injury problems.
"We might go again but Nottingham Forest have been pretty firm so far in that respect and I can understand that, they are going very well in the Championship," he said.