Where your 2 pecs meet.

[K.Biz]

Ok mabye im doing somthing wrong, and my chest genetics are f*ckin horribal, but my chest is fairly big, but it doesnt connect in the middle, theres a good sized gap. what should i work on to get the very inner part of the chest more?

My back, arms and legs, everything is great, but my chest just hates me

[Midwest Viking]

do more cable crossovers (not flies as a substitute)
try doing bench press with your hands at shoulder width apart
do more dips

These are all good ways to hit the inner chest. It does also hit the triceps and shoulders ofcourse when you do dips, and narrower bench, but, it also hits the inner part of the chest.
Real wide bench focuses more on your outer chest, and flies will work your outer chest, but near the top, releave pressure before your inner chest has time to work
etc