Confirming the identification of Cat 941 or 951 Loader?

I have some undercarriage parts to get ordered for this machine that I have owned for a few month & there are some discrepancies in it's identification. The decals on the machine say 951 & the Ser # tag up on the RH frame tower facing the operator indicate a 941 (Ser 80H 2988) (BTW I posted about this when I first got the machine), so this morning I removed the counter weight to see if there was another tag on the frame under the counter weight......nothing there. I am wondering if more if the plate work for the hitch has to come off to reveal an ID plate under it? Perhaps the ID tags are not always located on the back of the machines?

Any other telltale methods to differentiate between the between the 941 & 951 machines?

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Confirming the identification of Cat 941 or 951 Loader?