Easy MC4 Question

[John.DS99]

I bought some MC4 connectors from ebay and have had no problem connecting and disconnecting them.

The connectors on the back of my solar panels look different and have no place to pinch to open them. They look like the picture below.
I couldn't detach them by pulling with hand pressure. I don't want to damage anything by putting too much force on them with pliers, unless they can take it. I am concerned that they have locked together, and I am ignorant as to how to get them unlocked.

Please help,

Thanks,
John

 

[John.DS99]

I figured it out, they did have tabs, hard to see them. With my eyesight I was lucky I was able to find the roof.