MGN12C Carriage Mounts for Y and Z Axis

When I ordered my MGN12 rails I did not specify with carriages I wanted to the seller. So I ended up getting MGN12C instead of MGN12H. The MGN12C's are much smaller and the screw pattern is different.

MGN12H = 20x20 screw pattern
MGN12C = 20x15 screw pattern

Here are the Y and Z axis mounts that will work with MGN12C carriages should you have gotten these instead of the MGN12H