Hello

I have an attached apartment to my home on a separate meter. The inside panel says trumbull manufactory co. multibreaker 120v-240v 70 amp. I am not familiar with these breakers at all. I would like to add a 220v circuit for a washer/dryer stackable. There are 4 switches but it looks like 2 big breakers. Each switch has 2 screws and one black wire connected to a screw. Does this mean the other screw is usable? I would like to take one of the wires off one and put it on one of the open screws of the other giving me 2 open screws on one switch and then attaching my 220 line to one of the switches. Is this possible or even close to correct?

Thanks in advance for any responses
mardiman

Are you hear in the U.S. Can you please attach a photo of the panel box