stans syringe

Im sure this is just me but I jhave bought the syringe to add the sealant, following the instructions, I have removed the core of the Presta valve. Now to screw on the syringe which has an internal thread. What is there to screw it into??????
Can anyone help, its driving me nuts!
Can anyone help, its driving me nuts!
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Parktools :?:SheldonBrown
Evil Sovereign
i usually just hold it on with a little bit of towel and its fine.
does look like the above will need one of these.
http://www.chainreactioncycles.com/Mode ... elID=38828
Parktools :?:SheldonBrown
Youth