One traveling nursing mom wrote:
Kuala Lumpar Convention Centre does not have a dedicated nursing room. However, they do have a baby diaper changing room at ground floor.

The room has an adjacent bathroom, a sink, a bench and best part of all, a power point plug! Nursing/ breastpumping in the room is ok since hardly anyone goes into the room. However, beware of the cleaning lady as I had personal experience where she came into the room and started asking me questions such as; where’s the baby? Wow! that’s a lot of milk that you’re able to produce within 1 session (leaving me feeling embarrassed, hahaha).