I'm not 100% sure because I get them mixed up in my head, but I think the MXUS freehub just pulls off after removing the nut, though it's possible that they could have changed it. I know you can get two versions of Bafang CST from the same time, so anything is possible.I 've not opened a mxus so not can't say, some freehubs on these end plates are removable and some aren't.
My Q128C isn't removeable and one has to buy a complete new end plate assembly , my Bafang CST is removeable once the end plate is off.
Best speak to Woosh as they may carry spares if it isn't removeable.
d8veh/saneagle will likely know for sure.