zalman z9 plus - where shall i put my temp sensor

[arnie2013]

hi

i have hte zalman z9 plus case and it comes with that tempature thing on the front.
my motherboard is the asus sabertooth z77

now i just want ot know where have people put the sensor that gives the temp reading,
currently i have put my under near my motherboard guard, where my graphics card is

 

[arnie2013]

Anybody have any suggestions

 

[arnie2013]

ye I just want to monitor ambient case temp, so where would you suggest I put it in my zalman z9 plus case