Measurements of bolt holes on the y rails of a 2x4 5 pro

hello i am wondering if anyone has the measurements for the bolt holes on the y rails of a 2 x 4 5 pro? i would like to make tracker keepers for the wire tracks on my machine. any help would be appreciated thank you.

I am planning to cut some on my laser tomorrow so I will figure it out then if you don’t get an answer first.

Thank you so much that would be so helpful for me.

Looks like 60mm to me.

Actually, I have the 4x4 but I am going to guess the hole spacing is the same.

ah thank you so much for this i think it will really help me