Cannot boot into windows when Mac OS Drive connected

Long time lurker first time hackintosher here, I have Catalina installed (opencore 0.6.8) on a seperate ssd to windows, but windows boot manager does not appear as a boot option unless I physically disconnect the ssd with MacOS. Windows boots just fine when I disconnect the other drive, but there has to be something that I'm missing, I see most people say to install Mac first and use bootcamp but that is not an option for me.

If it's at all relevant I'm using an MSI Z490 gaming plus motherboard with the latest BIOS.

submitted by /u/Dahnan
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