ok...
I'll try to explain a bit more clearly,
On a strat, and I'm assuming on yours - a chromed metal cup is fitted to the body to hold the jack plug.
like this:
you need to undo the 2 screws holding it to the body to be able to hold the jack itself firmly whilst you tighten the nut holding the jack at the front.
like this:
(no need to remove the pickguard as in the picture) from here, you will see a contact prong sitting out of the back of the jack - slightly bend this in toward the centre hole of the jack and insert your lead/cord and check for good contact.
If you really unlucky or you have tried to tighten the jack without holding the back then wires may have broken off.
If so, the will need soldering back, if both are broken off, post a picture and I'll be happy to sort the wiring from there.
HTH
Mick