I went to Simon many years ago and had the man himself fit it so know the procedure but nothing written I can send..
The hardtop uses the hood clips on the front screen and some adjustable over-centre catches that use hooks fitted to brackets at the B pillar which are held by the hood securing bolts.
I made another set of brackets and hooks so I can swap the hardtop from the older SE to the current SE and fitted them when I was swapping the old black hood for a blue S2 one because it uses the hood securing bolts to attach a bracket with a hole for a bolt that holds a long retaining strap. Older SE, hardtop and brackets are not conveniently local but current car is in my garage so have taken photo of B pillar hook in situ that might help ...
the brackets are out of sight but are triangular with a bent offset that makes them handed, two holes to secure with hood bolts and one hole for the hook bolt you can see in the photo. Hook is slotted to give coarse vertical adjustment with fine adjustment on the over-centre catches.
hood bracket.jpg
Fitting those brackets is a bit time consuming as several trim panels need to be removed to get to the hood securing bolts.. so it's basically -
Remove the hood stowage cover, which is remains off when using the hardtop, remove carpet and corner trim panels.
Remove B post trim - I think rear speaker panels have to come out first, seem to remember they did when I changed the hood.
Then remove hood securing bolts and refit with handed triangular bracket in place.
Replace trim panels and carpet.
Fit hooks to bracket with bolt and nylock nut.
I'll take some photos of the old SE, which still has the trim panels off, when I'm next at where it is. (I rent a unit to keep my 'boy's toys' as my domestic garage isn't big enough, but it's very dangerous as it's tempting to collect more toys !)
I used that car with hardtop fitted when away on business for several months but had petrol leak so removed the hood to investigate it and made up spacer tubes to refit the hardtop brackets. Found it really useful having that shelf available again, but a it's a bit of 'a procedure' to refit the hood for summer use.
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