20mm spent cases

[Jon]

Did the 20mm spent shell cases eject from under the wings of the BF109e or were they collected in a container in the wings after they were fired ?

Also on different note, the MG17 carried in the tail cone of some HE111's often shown in Battle of Britain downed HE pictures, i assume it was belt feed but how many rounds ? and did they actually get any results with it ?

Thanks
Jon