cold start does not come from an ecu, it's the starter and the temp of the thermal time sender that fires the cold start injector.

what ecu? does it have an oxygen sensor? if so, it's probably a 25 pin ecu. post the number and i can check. that would be a TYPICAL kjet w/lambda and the connector and harness would be close if not the same in HOW it plugs into the ecu. the wire color WILL be different as volvo, vw, saab, etc used thier own colors. you might have to move a wire or 2, but that's easy enough.

personally, i wouldn't worry about it. the o2 was mostly for emmisions and there's little, if any, benefit in mpg. having owned kjets and kjets w/lambda in 240 volvos, the o2 got me approx 1-2 mpg on the highway over the non-o2 cars. the m110 is thirsty and the o2 working won't help much.