Question How do I install ram in an an asrock b250m pro4 motherboard?

2nd and 4th slot from heatsink are the correct slots for dual channel. As said, the ram stick has a notch underneath you use to align which way it sits. Press in until the dimm latch fold inwards locking ram into place.

Motherboard manual should have a install diagram.
 
2nd and 4th slot from heatsink are the correct slots for dual channel. As said, the ram stick has a notch underneath you use to align which way it sits. Press in until the dimm latch fold inwards locking ram into place.

Motherboard manual should have a install diagram.
Everything is llined up perfectly i checked it my problems is that no matter how hard i lus it evenly it doesnt click in. I looked at the manual it says that both flips habe to be open but my motherboard has only one flipable switch So i guess the manual is incorrect.