For those doing toy mods (like adding a switch) — I’ve had good luck with these. 10 inches long. Leads are already stripped and tinned — and no mesh shield to get in the way. $14 for a pack of 10.
Found them on Amazon. Look for: Fancasee (10 Pack) Replacement 3.5mm Female Jack to Bare Wire Open End TS 2 Pole Mono 1/8″ 3.5mm Jack Plug Connector.