After looking at your pictures and looking at the schematic of the MCB-1, maybe I'm just not looking at it properly, but, are the pictures of how your circuit is now connected? Because it looks like you have pins 8 and 15 of the D connector tied together. And I as of yet (still looking it over) …

The 15 pin D connectors will have the pin numbers embossed in the insulator body on the wire side. Yup, they're tiny and hard to see too. Also keep in mind that "male" and "female" connectors will have pin numbers that are a mirror of each other so that pin one goes to pin one. Yeah, yeah, I know …