Your brevity...
... makes it a bit difficult to answer...
YES, is the answer, but just what the hell are you doing?
If you are saying you are using the fuse panel and want to use a spare position to fuse the BWM wire you are running, sure, go ahead. Then run a wire from the fuse to the brown wire on the ignition switch or its connector.
I'll stop here, and let you explain more if necessary...