Hello, I have S2a, -88,1963, positive earth, petrol. Yesterday I connected the cable from the new ignition coil to the distributor on negative. The other cable from the ignition I also connected to negative on the distributor. As I tried to start the cable from the ignition coil to the distributor burned up. What do I do wrong?

First, get a wiring diagram for your car - it will be a good thing to have.

With the coil, the 12 volt wire from the harness goes to NEGATIVE. The wire from the distributor goes to POSITIVE.

Putting both wires to negative created a dead short. Fix the wires and try again.