Hi
Does anybody know, what footprint to use to get the right 3D-shape for the connectors in the picture?
regards/hk007
Look like Molex connectors, there are footprints for those in the KiCad library and some have 3D models. But besides the pin count you’ll also need the pin pitch to narrow the choice down. Better still if you have product IDs.
Unfortunately I do not have any product-ID. 
Is there any way in KiCad to see the shape in the footprinteditor?
Its very boring always to change the footprint, goto to the PCB-Editor and make a 3D-view.
As far as I know the fastest way is to open the footprint editor, select the footprint and type Alt-3 to bring up the 3D view, if there is one (some footprints don’t have 3D models). But for sure you can exclude a lot, such as the SMD footprints.
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Why don’t you ask Elektroshop - since that is where the image appears to come from? Otherwise, use a pair of callipers to measure pitch and pin size - it looks like a Molex KK but you need to check size. https://www.mouser.co.uk/images/molex/images/470531000_t.jpg
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ALT-3 is great!
Makes life easier 
TY
The picture is only an example.
Parts are out of my trash-box
I know, its 2,54 pitch. Actualy using Pinheader 2.54. But it looks different in 3D-shape 
EDIT:
Molex KK is very near. Will try this
We cannot tell from the image if this is a 2.54, 2.0, or even 5.08 pitch. They all look very similar except actual size.