How do I connect metal microelectrodes to the Warner DP-311 headstage?

It is generally left to the user to devise an electrical coupling between the metal electrode and the Warner DP-311's headstage.  For example, a custom wire can be connected to the headstage using PJ2-5 2 mm Jack, Uninsulated, which are available to purchase from ADInstruments in packs of 5.