Dell Precision 7520 Owner's Manual page 54

c base cover
d hard drive
e keyboard
f palmrest
g display assembly
h display bezel
i display panel
j display bracket
k display hinge
l camera
m eDP cable
The component you are left with is the display cover.
3 Install:
a eDP cable
b camera
c display hinge
d display bracket
e display panel
f display bezel
g display assembly
h palmrest
i keyboard
j hard drive
k base cover
l battery
m battery cover
4 Follow the procedure in
54 Disassembly and reassembly
After working inside your computer.