Reinforce inside of nosecone with piece of styrene card (1-2 mm thick), drill hole in swing bar, drill somewhat smaller hole in nosecone, put screw in swing bar hole, screw screw into nosecone hole without tightening it too much (tightening it too much will strip the hole).
If you want a sturdier connection you can carefully put a drop of superglue in the nosecone hole before putting in the screw, but you've got to put in just the right amount, otherwise the leg will be immobile.