Ref to KMC, this was sent by them:

"The new X11SL x 116L chain is compatible with the Shimano 11 speed system. We have designed our chain so it can be compatible will all systems. For the MissingLink 11 as of right now it is only compatible with our chain and the campy 11 speed chain. As soon as we release an updated version compatible with all 11 speed chains we will update our website."