DB1 = CB1
DB2 = CB2
DB3 = FS
DB4 = SS
LB1 = LOLB
LB2 = ROLB
LB3 = LILB
LB4 = RILB
DL1 = LDE
DL2 = RDE
DL3 = NT
You can set your depth chart up to match this. However, when the subs come in, this will get all out of whack. Good luck and I hope this helps.
ps
This is if you are looking at the 3-4 formation on the page. Real life would be different on R and L