Plasma trigger reversed??

I recently built a plasma table based on the JD's garage plans. I am controlling the machine with an arduino uno. Everything is operational and ready to go except the plasma trigger relay. It works exactly how you would expect except the trigger is backwards through the arduino. The controller is activating the relay as soon as it connects.
Is there a way to invert this control that I am missing? I understand there is a normally open and normally closed circuit on the relay, that is not the issue. It is triggered opposite of when it should be.

 

This was my problem. I was just using an old relay I had purchased and never used years ago and didn't realize the ones they used in the plans had the high/low option.
Now I just need to figure out why my z axis is going crazy and I'll be all set. The probe switch goes on and off randomly when I look in the troubleshooting section of the GRBL controller. At first I thought the wiring was causing the issue but after rewiring and re routing multiple times it seems almost random. when I test continuity on the switch it seems ok but if I disconnect the switch the issue evaporates. Maybe a bad switch? Ever seen this issue?

 

Since I already had all the necessary components on hand to build this machine from previous CNC adventures I will be using what I already have. I will keep the blackbox products in mind for future use as they seem like an easy and affordable solution.
FOr now, I isolated the pins with an optocoupler relay and that seems to have done the trick.

 

Seems to be working. The controller sends like it is only looking for the signal while executing the probing routine so i should be in luck for now.