This doesn't mean the dog likes the kennel.
It means that:
a) It is now easy enough for you to get the dog into the kennel.
b) The experience of the kennel isn't so unpleasant that the dog isn't willing to risk it for some meat.
(And, of course, the dog lacks the capacity to consider the ratio of meat to the time/duration of kenneling.)
Also, there are things dogs will not do for food. One of mine cannot be bribed into the bathroom when she knows I have designs on bathing her, even if I am waving around a juicy slice of ham.