connecting rear case fan to gigabyte motherboard

Solution
You'll want to check your CPU temp while you're using it. If it's getting too hot with just an exhaust fan, you can leave the side panel off. You can also direct a table fan into the side of the case, but I doubt you'll need to go that far.
If you're talking about a GA-78LMT-USB 3, with one CPU fan and one chassis fan header, you'll need a splitter like the one linked below and plug both case fans into the chassis fan header. It's a three pin splitter, but your case fans are probably three pin also, and you can plug them into the four pin header - it'll just leave one pin exposed but you don't need it.

If you have a different mobo, please state the exact model number.

http://www.amazon.com/Splitter-Extension-Sleeving-Connectors-Length/dp/B00C46DX4S/ref=sr_1_cc_2?s=aps&ie=UTF8&qid=1420503782&sr=1-2-catcorr&keywords=fan+splitter+3+pin
 
right but for temporary use is it better to use the intake or exhaust fan until this part comes because there is only one header

 
You'll want to check your CPU temp while you're using it. If it's getting too hot with just an exhaust fan, you can leave the side panel off. You can also direct a table fan into the side of the case, but I doubt you'll need to go that far.
 
Solution