Miracle 20 - Cracked Front Crossbeam

I have a miracle 20 in which we cracked the front cross beam on top exactly where the mast sits. I have removed the beam and inspected the hulls which are fine. I am ordering a new crossbeam from Hobie. Just the beam which has the vertical support tubes already in place. The question is how does the striker mount inside the beam and what is the process to do this? Any ideas? pictures? videos?