I am servicing the injectors on my '94 850 non-t wagon...and I think i've lost some of the seals.

As i try to reconstruct this, I see the following:

3 o rings on the injector:

one at top of injector where is inserts into fuel rail
one in the middle of injector
one on the lower part of injector
also a 'cushion' that sits on manifold seat

my questions is: is there yet another seal which goes near the top of the injector, which I likely lost when pulling them out? there is nothing left in manifold - which I took off and cleaned. each supplier - fcp, eeuroparts & ipd seem to carry different parts, or refer to them alternately as o rings and seals.

would greatly appreciate some clarity so I can get this back together!
thanks