Panasonic Pro 11 Commercial Microwave

Hi
We have a Panasonic pro 11 microwave which recently the Timer Rotary switch turned on its holder and snapped the wire off. We ordered the part and it arrived today but an note came with it that said this may look slightly different to the original but it will work fine. The problem is the old one had three wire which were 1 x White, 1 x Black wire and 1 x Brown wire, The new one is identical in serial numbers etc except it come with 1 x White, 1 x Orange and 1 x Yellow. We were wondering if anyone on here knows which wires correspond with each other so we can refit without causing a problem .