What are the pin assignments in the Connbox - CB3? Mike Keen April 11, 2018 00:14 Follow Thanks for your enquiry. Please find attached the CB-3 schematic. CB-3_Mk2-STD_Rev1_Wiring_Spec I hope this answers your question. If you have any other questions, please don't hesitate to ask. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.