Can One F/S Run Two Heads?

I play through two RD100 heads. I haven't tried this yet, but I'm wondering:
If I plugged the RCA male jacks from each side of the footswitch (the channel switch side, and the reverb on/off side), into splitters (or Y-jacks) then plugged them into their respective RCA female inputs on each chassis, would that switch both heads simultaneously? Would it cause damage somehow?
Eric