Windows 10 Install on WD Blue 1TB Hardrive // Combining split .swm files back into install.wim

I have a jump drive with the Windows 10 ISO file ready to boot. It's FAT32 which only allows a max individual file size if 4GB, so the install.wim file had to be split into two swm files. This is a brand new hard drive with absolutely nothing on it. How do I recombine the swm files? Is there a way to use a basic terminal to do this without an operation system?