do you have any photos of the PCB?
if you have as long as the power is the right way around there should not be any damage swapping clock and data, so if you find the place the old cable was plugged into and retrace the pins from there it is just a 50-50 trial and error, either it works from the get go or you swap data and clock and it works then. as long as you got power right that is, and if the keyboard still works.