matsui 14V1R / Grundig cuc7303 handset circuit diag

[xantica]

I can't edit my wanted post so will try again here.
My son ( autistic ) pulled his remote control handset apart and broke a piece of off it, it is marked as 5001 on the handset pcb, can ayone please tell me what that part is and f yohave a circuit diag for it I would appreciate it very very much.

I believe the chassis in the matsui set is the same as the grundig one a cuc7303.

Just in case it makes a difference we live in the UK
Thank you
Xan