Z axis

Hi again.
I’m finishing up my basic configuration so I can start on the PlasmaC .I’m stuck on the z axis specifically with the limits setting.
I have all other axis calibrated, home switch switch work along with the offset. I hit the home all button they all work but the z axis.
I attached a picture of my z axis for reference. I’m following the plasmac users guild, I’m in section 4.4 My Questions are ;
I set my the switch inputs for all axis to “home”, pnnconf wizard, X YY’ are working this way. Should I keep z axis the same or should I select a limit/home shared.
In the picture a tab on the left side is the proximity sensor marker. Is this suppose to be my home? Travel up, towards stepper motor is 1.5 inch max and travel to slats is about 3.85 inches

here are my ini and hal files

Try jogging to the top of your Z axis and touch off the Z at 4.00 and nver touch it again...
That should put the z 0.0 at the bottom of travel

Change the limits for z axis to min 0 and max 4.

I was messing with the proximity sensor and was able to jog the z axis down and it finished homing. I did do the touch off. so follow up question is will I have to do this every time I start my machine up, or will the touch off be stored in my configuration ? my understating is that you to home all joints every time you power on machine is this correct?
another question is in regards to the floating switch/Breakaway Switch
I have a mechanical switch NO set up for my breakaway. In the pnnconfig wizard under the TB3 tab section is the place to set up the inputs and outputs what is the label that the float switch should be ? while in the TB3 section what is should I pick for the function for signal to the relay for turning on the router/torch?

What board?