The wago 221 mentioned by notch are here
use the drop down box to choose between 2/3/4/5 way, you can also get a mixed box
looks like the cable between the ceiling part and the part with the arms can be adjusted in length such that if you have low ceilings you move the "arms" up by shortenining the exposed cable or if you have high ceilings the cable can be longer so that the "arms" are lower. just a guess though...
are you just "parking " it in the back of the box so covereing the end of the cable safely? but if you are connecting more than two cables wagos are the way.
if yes, try these they are quite small and will sit in the back of the box easily...