Citizen X3 - re-attaching the drawband to the mainspring - help!

Hi folks, I recently came across a very tidy Citizen X3. Apart from it needing a good clean and a couple of typebars not laying flat, it's in great condition. The issue is, the drawband has completely detached from the mainspring and the carriage (though I have the string, and it's intact). It's not entirely obvious how to reattach it, and I don't have a huge amount of experience with typewriters yet!

Does anyone own one of these? If possible, could you snap a pic of how the band is attached? There's so little about these online, I'm hoping someone here can help :)