There is no specific connector that is practical... It looks like standard header spacing.. .1" "The cream 2 pin connector" doesn't make sense because theres nothing in the link you provided that suggests a 2 pin connector.
That's probably the best solution. Assuming you have the LED matrix on hand, go into a battery store (or Wal-Mart or a similar big box store might have cordless phone batteries too) and visually size up the connectors on the cordless phone battery packs against your LED matrix's connector and buy one that fits and use its pigtail. Of course, make sure you dispose of the battery itself properly (or better yet, reuse it in another project!).