The directions clearly indicate that you need to use this adapter to be able to get the SSD recognized before you can migrate the data , very confused and disappointed.
I am sorry you are having this problem but let me help you.
Please note there are two kits for the SSD: the Desktop version and mobile version and both include different adapters. Here you can check more information:
My best recommendation is to contact the place of purchase and request to have the product exchange for the kit that comes with a SATA to USB adapter for the SSD.
Well i contacted Newegg and it appears that they sell an OEM version and a retail version which i bought , nether come with a USB to Sata cable and both say they are for mobile and desktops PC's .