1st line tr white blue to set, A1 A control leads white orange to set, LG L lamp leads white green to set. Than your second line to the set right down per color code. The bottom tr are your CO feeds, line one on down. b1 r1 are your common bell leads. (mind you this is all from a faulty memory) rb rg I'm pretty sure is where the ring generator goes. The rest are battery and ground leads, ones filtered the other isn't, the filtered is your talk battery for intercom. I believe these leads will be connected to the power supply. As far as the 400D's go slot one will be line one, so the way you have it the first two lines would be dead. Hope this helps, I think it's mostly accurate and if not I'm sure someone else will chime in.
