Rack Ears are provided with the Qu-Pac.
Please see the Getting Started Guide - available on the product page - documents section
Page 4 - Packed Contents
19” Rack Ears and screws
AA9848-L and AA9848-R
4x AB0344 M6x16 screws
4x AB0345 M6 cups
4x AB0332 M4x8 screws
Page 8 - Fitting instructions