home switch setup on gantry mill

preamble:
i am converting an mr1 to linux cnc via 7i96s. the y axis is parallel stepper motors.  y2 and z home switches are nc type and in series. the box i am making is all new drivers/power supplies only thing i will be reusing out of the factory box is the vfd for the spindle. i want this to be a plug and play so i can swap back to stock box if needed. dealing with code is not completely forign to me but the last time i did anything serious was in msbasic, and a little dabbing into megasquirt engine control.

im not sure the best way to set up the homeing switches. i tried
1. assigning net home-y2     <=  hm2_7i96s.0.inm.00.input-03-not and
    net home-z     <=  hm2_7i96s.0.inm.00.input-03-not
   did not work gave errors

2.checking home is shared on y2 and z and only asigning an input to z.  did not work either

3. tied 2 inputs together and asigned them each as y2 and z
  worked but don't seem right to me

4. in z axis joint3 i put
net home-y2    =>  joint.3.home-sw-in and home is shared

that works but does not seem right.

what is the best way to do this, or is there another way

Just in terms of naming, something like seem a bit more readable

net home_y2_z hm2_7i96s.0.inm.00.input-03-not
net home_y2_z joint.2.home-sw-in  # assuming joint 2 is Y2
net home_y2_z joint.3.home-sw-in

also of course Z should home first (and I assume there is a Y switch as well so you can use gantry homing)