Trying to evaluate an SB 104A with only the assembly manual. What is the purpose of the jumper wire between pins 5 and 2 at the accessory socket? Thanks. Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'" Listserver Submissions: heath at listserv.tempe.gov Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"