It's simpler – you need to use GrannyViewer to see the direction of the axes of the bone to which you attach the sword effect, etc.; the Z-axis is not always pointing upwards (the standard orientation for a head or helmet)! Then, in Maya, you need to center the model; for a sword, this is the center of the sword's hilt, but the orientation along the axes must be done taking into account the orientation of the axes observed in GrannyViewer!
Now things will go faster)))
Added after 14 hours 15 minutes
Different colored horses for the Academy:
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What other colors should I add?)))