Keyboard replacement (no buttons are working / yes it's connected ;) )

Hi,

I had a douche tip a beer on my MacBook in an airline lounge and all seemed to be working so I let him off with buying me another beer. A few days later all the keys started sticking so I attempted to remove a few to clean them with alcohol and then had to buy a few replacement buttons. I'm sure all who have tried before me will attest to the new butterfly mechanism being a PITA so after it got worse and worse I ended up just buying a whole new keyboard. I have successfully replaced the keyboard physically thanks to ifixit's toolkit however the MacBook doesn't recognise it (no buttons work). Is there something else I need to do to achieve this or have apple duded me again by not allowing DIY repairs?

Any help is appreciated