Yep,
Moisten the push button cable with some good lube, then with a firm grip insert into the firewall, it will be hard pushing at first but with a gentle push pull action you will gradually be able to insert the full length thru the firewall you will know it is all the way thru when it goes limp in your hand, at that point grab the rear end of the cable where it tapers down and with some additional vigor work it side to side like a crab walking on the beach. At that point you can then spread the legs on the female portion of the bracket and slip it over the protruding portion on the backside of the panel. The tranny is now operable but regular lubing is necessary to reduce friction and the gradual deterioration of the device.
Good luck