Topcase part number compatibility A1181

I just bought a new top case for my A1181 with part number 613-6408 (bronze cable) and connected it to the logic board which previously had a topcase with part number 613-6695 DD#2 (silver cable).

Only the power button works, but the keyboard and trackpad do not work at all. So it looks like they are not interchangeable after all even though the connectors look the same.

Can someone please clarify or confirm that the two part numbers are not cross compatible. Or is it just a faulty topcase that I have received.

Macbook Core 2 Duo 13.3" 2.1 GHz A1181