On my engine, the rocker cover breathers (A) go to each carb body - i.e there's one B on each carb.
Your other connections are correct.
With regard to the oil pump, I can't remeber if that's the oil temp sender or oil pressure switch, but I think it's the pressure switch in which case you need: (from Paddocks website)
AMR2092 Oil pressure switch - 8.25:1, 8.13:1, 9.35:1comp £1.80 + vat
HTH