1. Extract folder to Documents/Sport Interactive/Football Manager 20##/graphics/kits/put in here!

( If there is no graphics folder there, create "graphics" )

2. FMXX - click 'Preferences' > 'Interface' > unticked 'Use caching to decrease page loading times & tick 'Reload skin when confirming changes' > click 'Reload Skin' for first your time.

THEN ALWAYS when you download other packs, DO Click 'Preferences'>'Interface'>'CLEAR CACHE then again click 'RELOAD SKIN' AS ALWAYS after downloading to folders.

Enjoy

Any problem - please go to this thread - SS Help/Discussion Thread or PM hammer9.

Or if kits not showing or not add third kit..please go to this thread -
Any problem - please go to this thread - SSKCC Thread for FM18 or PM hammer9.
OR go to this thread - SSKCC Thread for FM19 or PM hammer9.