2006 MDX 3.5L swapped no crank no.start will.stary if starter terminal jumped

Check the primary circuit to the starter relay with multimeter or listen to it when someone tried to start the vehicle. If you hear the relay click the problem is in the cable to your starter. But most likely it won’t click. I suspect that the problem is in the primary circuit. The most common failure would be the park neutral switch or the safety neutral switch if it’s a manual tranny. Then it could also be the relay itself.