New Veteran fill probe problem

Have you looked on the other side opposite where you're trying to insert the probe? Unlike some airguns that use probes, the Taipan Veteran (I think) has one side the probe goes into the other side is smaller... Or maybe Utah Airguns sent you an FX probe? Disregard if you're already aware of this... I like it that the Taipan, Vulcan, and EDgun probes are interchangeable. ;)
 
I just moved into a new house my caliper still somewhere in my garage in a box :(

here are a few pics of the two probes, the one on the left with the black male quick-disconnect came with my shorty,

the one on the right came with 25long, you can see the probe for the 25 long has a slight smaller hole compare to the shorty’s probe.

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also there is a small difference on the ends of the probes.
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