I have what I think is the same stove. Mines a Nestor Martin Efel Bayard and Im told Surdiac is involved in it too. Mine looks the same.
Anyway, the longer one is towards the front. If Im wrong Ive been doing it wrong for over 3 years and that is possible. After that time the front of my hopper is about worn out and cracked but I hope to get one more year out of it.
If you ever get tired of the panes of glass and want a one piece, send me a private message and i'll hunt for the right size for it as I ordered one. not cheap. You'll really like the side door for poking around.
heres a diagram of the stove and parts list. Theres more then one page. Its basicly the same stove as yours only without the fancy top.http://shop.euroheat.co.uk/Spares/77/1/ ... 86-65.html