Power Distribution Board

This is somewhat embarassing, but we are unable to figure out how to actually put wires into the gates/breakout terminals on the power distribution board. We dont know how to get these terminals open, can anyone let us know please?

Thanks alot!

The terminals are Wago connectors. This thread has a link to some useful resources. There are also a number of other threads that have useful information along these lines.

thanks got it!