iPhone schematic diagrams
key component placing of PCB (display side).
connectors placing of pcb.
details of cellular components of PCB (battery side ).
details of cellular components of PCB (display side ).
sensors.
mic.
speaker and mic.
camera.
vibrator.
2. iphone 6s plus schematics diagram
here is searchable pdf file of iphone 6s plus PCB
here is full service manual/ schematics diagram