Christian Perez200148

Heard it go both way but need help with my flexplate/flywheel. Have a truck that is half way done with repairs but ran into a problem. First of all put the new flexplate in and now it won’t turn at all to screw it on to the transmission? What does this mean or do I just not understand how I am supposed to do this? Also while dropping the transmission I must have broke a piece of and now can’t figure out where it goes thought it was my transmission line or oil line but both look fine. Thanks for the help in advance any advice will help.