I always had a hard time to pull apart some of the plastic connectors, especially if they are multiple ones.  Today I tried something that may help some of you too.  I used a plier that opens wide circlips and it separated the two with ease.  Voila!  A new tool.  Fast and easy.  This circlip plier I had to buy when I worked on the transmission to change the seals of the drive shafts.  That circlip does not have those little holes, only flat ends and this tool is made for those.  Super.  Very recommended to use, instead of struggling to pull apart the plugs from each other and bump your hand on something in the process.
Zoltan