Hi. i have just replaced a barrel on a bmw 316i

hi. i have just replaced a barrel on a bmw 316i auto n reg. this barrel i bought second-h. it also came with this box,now this is were i need some assistance.this box has the letters [ews 11]and 61.35-8 380 365] as i have said i replaced old barrel with new but this box has something to do with de ignition. it has to plug in somewere and i cannot find were it goes in the car i have not turn the car on yet as i was told not to until i find out about thi box