EL AL Matmid - TLV-JNB-CPT - Does ElAL issue both boarding passes?

We are traveling on an award ticket TLV-JNB (LY) and then on to CPT on BA/Comair. Will Elal tag the bags to CPT and issue boarding passes for both flights or will we have to claim bags and check in at JNB for the CPT flight?

i would think that you would go thru customs & immigration at jnb, so you would have to handle the bags there, but mine have always been tagged thru which meant dropping them off....don't know about bp's...