The new part is a single piece with the electrical portion mounted on the heat sink with 2 torx screws. But the only way I could take out the old part was to take out these 2 torx screws and then wiggle out the heat sink from under the plastic part of the cage.

I have removed all the torx screws I can see and the plastic part on which blower was resting but there is still a a plastic part in the middle of the blower cage that is above the heat sink that I couldn't remove and had to wiggle the heat sink out.

I need advise on how I can insert the new part into its place without separating the heat sink from the electrical portion first? I had great difficulty just taking out the heat sink. Thanks.