[IT Manta]

I am installing '75 efi into a '72 Manta. i am finding that my Opel memory has many holes. Two questions. It seems that the cover for the thermostat housing is different on the '75 if this is the case does anyone have one for sale? Also, the EFI harness I have only has one connector for the dual relay. Where does the other connector come from? Is it part of the main harness? I do not remember what I did when I converted my '74 to EFI back in the 80's. I can wire it in via the wiring diagram if I have the connector. Any help would be appreciated.