got it figured out with help from here:
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https://www.wowinterface.com/forums/...ad.php?t=46221
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https://wowpedia.fandom.com/wiki/UI_...ences#Textures
breakdown for my specific case:
"|TInterface\\PETBATTLES\\PetBattle-StatIcons:16:16:0:0:32:32:16:32:0:16|t"
16 - width i wanted to draw
16 - height i wanted to draw
0 - the horizontal indent i wanted
0 - the vertical indent i wanted
32 - width of the original image
32 - height of the original image
16 - the X1 of where to start my crop
32 - the X2 of where to end my crop
0 - the y1 of where to start my crop
16 - the y2 of where to end my crop