MK1 hood side seals

I noticed a bit of rubber poking out above the passenger side door glass on our mk1 the other day. On closer inspection, it seems that the rearmost seal above the door has separated a bit on the trailing edge. I've not really been able to have a good look at how it all fits together yet. Anyone replaced one of these and have an idiot's guide?

Looks like it'll be this part.

https://www.mx5parts.co.uk/hood-side-seal-rear-maz...

Fantastic. Thank you.