... relay, connction is reay,conencts it,it works.13. Out A (digital output) for the extra relay.14. Out B ... Steps:1.Open the rear cover, insert a SIM card to the simcard slot A. (If using one simcard,do not ... insert it into simcard slot A since the default simcard is simcard B)2.Insert ... the SD card3.Use a stick or pick up the simcard slot B,insert the simcard.