Linking multiple pcbs in a cab. Hazards?

[RepairGuy95]

Should a ground wire be added on the ground planes of pcbs to cab ground if they're linked by metal feet or a switcher?

Think Lego linking the pcbs together or should they be isolated.

 

[Big_P Big_p]

I would say that there is no need unless there is an identified issue. Both pcbs will be grounded through the JAMMA harness via the switcher.