Using the original X mounting plate and the Orbiter mount in the kit secure it to the MGN9 adapter with 2x M5x10 button head screws.

Mount the X stepper to it's mount with the original M3x40 countersunk screws and the stepper cover.

It'd be wise to feed the X belt into the top of the 2020 channel under the MGN adapter blocks.

Install the belt tensioner. Mine isn't part of the kit so you should install it in the reverse order from disassembly if using the stock one or according to the instructions from the manufacture.

Secure the belt to the bottom of the X carriage plate.