Any vintage train experts out there? Need some practical help...

Jay37

Hi, can anyone assist please? I have a Train Signal Post (BOID 185751) that currently has the circuit breaker bar (BOID 353949) attached. I would like to separate them to better clean them and know they must come apart, but I can't see an obvious way to do so without applying too much force that risks breaking any tabs. It may be really obvious, but any help gratefully received!

Thanks in advance

James