Instrument cluster issues...65 Dart

Looking for some help...

I took out my cluster and replaced it with another cluster off a parts car because the speedo needle was broken. But instead of just the speedo gauge I just screwed in the whole replacement cluster housing with all the gauges and replaced the light bulbs.

Hooked up all the wires, reconnected the speedo cable and put it back in.

Now nothing works. Speedo needle doesn't work, temp gauge doesn't work. gas gauge doesn't work but it didn't work on the previous cluster either and im pretty sure it's the sending unit and im planning on replacing that. Not sure why the temp gauge and the light bulbs don't work now.

Regarding the speedo, could it just be the speedo cable is bad? I bought the car with the speedo needle broken so not sure about the cable. It looks fine but how do you know it's broken? Why doesn't the temp gauge work and the light bulbs? The left blinker light bulb goes on but none of the others and I used brand new bulbs.

This is my first time doing this. Thanks