just got some replacement armor for my jacket, as it was missing the shoulder armor when i got it secondhand, but i finally got replacement armor, but im not sure which way the shoulder pads attach
im referring to the one on the right, do the big holes go in the rear or to the front

Two of mine have those big holes to the rear 

thank you! wish they would have some sort of markings...
and the logo at the front dont count...

Well, if you think about what it's meant to protect, the larger portion is cupped to cover the back protion of your shoulder...