You should not add those drives to that node. This will be a RAID0 array which is not recommended since with a one disk failure the whole node is lost. In your case it’s much better to run a second node.
The Windows GUI installer doesn’t able to install more than a one service on the one Windows PC.
The recommended way is to use a Docker for that, it doesn’t have such limitation.
Or you can use a Windows toolbox to install a second service, but this is not an official tool.
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