Cuztomizing en_US layout on a non-en_US keyboard (Windows 10)

I use an en_US keyboard layout on a physical SWE/FI keyboard. For reference: SWE/FI en_US (image credit Wikipedia CC BY-SA 3.0) Everything works fine. However, there is one extra key next to the LSHIFT button. On my Windows machine, this key acts as a duplicate of the \| -key next to ENTER. On Linux (Arch) this key acts the way it does in the SWE/FI layout; as its own key. I vastly prefer the Linux configuration. Is there a way to duplicate this on Windows, i.e. rebinding the key without altering how the other \| -key (the one next to ENTER) works? I'm familiar with Autohotkey. Problem is I do

Question by animeavatar420 on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.