DRAGON 1/35 506s.Pz.Abt LATE KING TIGER

HELLO Guys!
i have some question about this kit and hope some guy can help me to fix
1.there are two parts O19 and O20 to use
which one is really used on No.109 in 506?
2.is 109 really have no zimm like the kit box?but i have seen a photo
that it does have zimm…!?so should i put zimm on my kit?
hope some guy can tell me what should i do
thx and peace!

Welcome to the forums
ive heard that most of the units Tiger 2s that used the prototype tracks in the Ardennes had zimeret, if youve seen the photo of the Tiger 2 with zim, and you want it like the real one then Zim the tank (theres ment to be some in “The Battle of the Bulge - After the Battle” but i havnt looked yet)

i dont have the kit yet for the first Q but im sure someone will be along soon

here is the pic
there is another question in red circle
which one should be used?
http://img129.exs.cx/my.php?loc=img129&image=59442pb.jpg
http://img129.exs.cx/my.php?loc=img129&image=59478kw.jpg