Step 1
Adjust the backplane to the CPU slot and place it on the rear of the mainboard. Ensure that the holes in the backplane are aligned with the slot. The 1851 slot uses the same gear as the 1700.
Diagram: Shows an Intel backplate being aligned with a CPU socket area on a motherboard, with close-ups of two types of spacers (blue for LGA 1700/1851, black for LGA 115x/AMD) and their corresponding socket compatibility.