this is what my spark plug leads look like...

You can see here the slot in the tool is made to fit the little flanges on the leads

So you slide the tool onto the lead and over the flange as per these images


Also helps to spray some CRC inside the lead, makes them go on easier
Hope this helps
03 MkIV GTI - K04-001, APR 2.5" TBE/TIP/Software, Forge FMIC, GFB DV+, Powergasket+, Dark Tint, 17" Bora Sport, Bilstein shocks, Eibach springs, BMC CDA, Dieselgeek SS, Hella Celis, R32 Alloy Trim...
95 MkIII VR6 (sold)
Bookmarks