NCR 7458 - Manual (Page 32)

3-8 Chapter 3: Hardware Service
c. Remove the USB Daughter Card by lifting up on it and then
pivoting it out as shown below.
20349
USB Daughter Card
USB Control Cable
Cable Clamp
Replacing the USB Daughter Card
Note:
The USB Daughter Card service assembly includes the
bracket.
a. Insert the two extensions on the bracket into the slots in the
Motherboard Chassis, pivot the assembly level, and push it
down to lock it in place.
b. Connect the USB Control Cable to the Motherboard.