Steering column coupler removal?

Guys, I feel like a noob here so please bear with me... I bought a new PST steering box and i can clearly see the timing spline on the box. I tried to put the old coupler on the new box and was having a heck of a time getting it on ( I think I had the timing spline lined up but it was pretty hard to see). I decided to get the alternate version of the coupler (left one in picture) as I understood that they would be intergeable but I am not seeing a timing spline on the newer application. Any thoughts on how I line this one up to make sure steering wheel is on center?

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