Analysis in Abaqus

I want to do an electro-mechanical analysis in abaqus. The specimen is a steel block of 50 x 50 x 20 mm with a groove/slot of 4 x 25 x 20 mm as shown in attached figure.

I want to pass 20 amps current at location shown in red and then check the voltage drop at location shown in blue colour. Please can anyone guide me the how to do this analysis in abaqus.

Thanks

Anil