Hi Mark, we did send you those extra rubber caps as you do have the curvy black pads. In order to attach those Extra yellow pads ( those are 2 different versions) you will have to remove those rubber plates and attach the new ones. Our team will send you a video to explain you how to attach them.
Please if you have any questions don’t hesitate to email us at email@example.com
, we are here to help you reach your goals! Hope you are enjoying your AbXcore!
Keep it up!!