I am in the process of replacing the tach face on my 430. I have the gauge cluster ready to be removed for the delicate work to be performed on my kitchen table but these two inner connectors refuse to come out. The outer two were (relatively) easy to unplug. Not to the inner two. My grip strength has declined with age and I'm loathe to use a tool other than a flat-blade screwdriver. I push the black tabs down and attempt to pry the white tab back but no joy. Below is a photo.