If you already pulled out the electrode - you went more then half way. The wire just plugs into the electrode. Pull it out and plug into the new electrode.
But...
The first thing I would check is the ceramic part of the ignition electrode. If it's not broken and not cracked - it's fine.
If there is nothing wrong with the ceramic insulation then the problem is a bad spark module (located inside the control panel).
- The part number for the ignition electrode is
AP2020574
- The part number for the spark module is
AP2020570
Gene.