This is the hard drive adapter connector for the internal SATA hard disk drive in the Inspiron 15 (5565 and 5567). This piece is sometimes called an interposer.

for Compatible Dell Laptops:
-Inspiron 15 (5565)
-Inspiron 15 (5567)

DP/N: P4TVW, 0P4TVW

Alternate Part Numbers: 
BAL20 NBX0001YV00