10sp cassette spacer or not space

I have a set of black Mavic k’ SL’s with a 9sp cassette there is a metal spacer on the freehub do I remove this to fit the Durace 10spd cassette or leave it on?

Cheers and beers,

leave it on. I have the same wheelset and went from 9 to 10sp - E

Thanks will do
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It also depends on what size cassette you are putting on, I keep the spacer on for my 11-23 and 12-25 cassettes but in the instructions that come with the cassettes it tells you which cassettes require the spacer and which ones do not.