Cable color codes

[K2CQW]

I know Red is power, Black is ground, what are Yellow and Blue. One is Clock, the other Data but which? Do I solder this cable to my MMDVM_HS_HAT?

[K2CQW]

OK fine, I dig up a 4 pin header. Which color goes to which pin? Please reread my question. Thanks

[K2CQW]

Gotcha, 73. I have a 4 pin right angle header arriving 6/24. There is a spot labelled Nextion on my mmdvm hat. All has been revealed unto me. Thanks for you patience.
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Update: soldered in the 4 pin header, connected the screen, et voila! Ca marche!