They recommend that you put it in the back for girls and in the front for boys. So I put it in the back for DD, but I haven't ever tried it in the fron to see if that is better.
I put the fold in the front because that is where my LO wets her diapers. I know they say to put it in the back for girls, but her inserts only get wet in the back if they are really soaked. Just put it where ever you seem to need more absorbency.
Baby boy H is here! Born 2/1/2014
Mysterious_wife: "And for the love of all things that sparkle, remove your last name" on BOTB.
Re: BG 4.0 folding
I put the fold in the front, with both DS and DD.