hi ive just put in some new plugs but when i was connecting the ht leads 1 of them popped out the cable inside is snapd, how do i reconnect it? when i push it in the connection is very loose!

Perhaps you could try silicone? or cut back the rubber a bit and inspect how it connects - thought they were just push fit.. then tape it back up after connecting maybe.

They should just screw in to the rubber. HT leads aren't just a length of conductor wire, it's a spiral inside the lead. To the untrained eye, an HT lead looks hollow and empty inside.