The cable with clip attached you must use for FEM unlock,the other one is for ISN boot mode.yes also you need key coil from any F series.
1.connect FEM on Bench using the wiring diagram you get on software
2.go to key learning option and check if working key is detected
3.Proceed with unlock and save secret file
4.go to coding/programing
5.Read ISN on FEM from ISN manager option 4
6.Write this to your used DME
for more details please watch the video for unlocking FEM.