iPhone x chassis switch and bluetooth not working

Hi. I made my first chassis swap to my iphone. Everything works except the bluetooth. Wifi and gps work, bluetooth doesnt. No guide talks about the bluetooth antwnna. On ifixit they list [iPhone X Bluetooth Antenna component as a bluetooth antwnna but i honestly cant locate it and i didnt find it in my previous chassis. Where is it? Is it possible that its causing the issue?

I correctly installed this piece though iPhone X Wi-Fi/Bluetooth Antenna which is regarded as a "bluetooth and wifi antenna" and wifi works...

Thanks