I think we can manage a little better than that.....
(17) is the rubber sleeve that the fuel pump (16) fit inside of and then presses into the four 'clips' visible in the photos you saw previously.
19 & 37 are the small hoses either side of the filter (20) that all get replaced with a longer section of hose, if moving the filter outside.
The diagram is a little confusing as most parts around group 30 are OUTSIDE the tank while the other stuff is INSIDE.
Getting things out can be hard if the hose is perished - I'd disconnect the hose clips and get the small hoses out if possible.
Then, I found that the four clamps had bonded to the rubber filter housing and needed prising back with long nosed pliers before the pump wanted to come out.
BEWARE - the pump electric connections are phased, so mark one pair up correctly if pulling EVERYTHING to pieces!
Frank