You can use the low current switches to kill the signal from your PID to the SSR to kill an element. That will work fine.
However: Be aware that SSRs tend to fail closed - In other words, when you have turned off your switch, the element is still hot. No warning, just burns.
You CANNOT use a switch to send 120v to the SSR trigger. The SSR wants something like 9v DC to trigger.
If that's what you are trying to do, you'll need a DC power supply (Old cell phone charger?). Switch the DC power supply to the SSR trigger to activate it.
This way the smoke stays in your SSRs