Eheim 2217/prefilter/55 gallon plumbing

Hi All,
Just set up a new Eheim 2217 on my 55 gallon tank and I'm wondering how to
connect the Eheim prefilter I purchased separately. The "upside down J"
intake tube that comes with the filter does not reach to the bottom of the
tank when connected to the pre-filter. The pre-filter, OTOH, comes with two
tubes, one straight about 10" long, another narrower with a curve at the
end, which is too small for the wide intake tubing of the 2217. So there is
no clearly obvious way that I see to connect the prefilter using existing
plumbing parts.

Before I go cutting into things I thought I'd ask here how the prefilter is
supposed to connect.

Thanks for any input,
Howard