Maybe so, maybe not. I don't know.Because he wanted to hope to get Romania as an ally in the future?
That kind of corridor is a joke which would have angered Hungary and Romania in the same degree, and please keep in mind that during the times of the Second Vienna Award Hungary was on the German side, while Romania was not.A smaller corridor can look like this:
Please note that this is an alternate history map.
I don't think that Romania's switch of sides has ever been seriously regarded by someone as an atonement.By leaving the Axis and joining the Allies, of course. Interestingly enough, I read that this Romanian move actually saved a huge part of Budapest's Jewish population--who were scheduled to begin being deported to Nazi death camps on August 27, 1944 but Romania's switch of sides as a result of King Michael's Coup on August 23, 1944 caused the Nazis to temporarily abandon their plans due to the much more precarious military situation that the Axis found itself in after Romania's defection to the Allies.