How To Install Correctly Haco Phone Jack

[Gik]

There is no screws to attach cables but plastic pinches. I am confused.

[rakman]

Looks like you wrap the telco wire around the "posts" and pull in and down to make contact.

Never seen one like that before, do you have a part number to google?

[RKASA]

Is there a wire strip gauge on the block? strip the wire to that lenth and push wire into block - it will hold the wire. Pressing on the tab or sometimes the hole opens the slot for the wire to release and pull it back out. Try pushing on a tab with small screw driver and see if the hole opens when you do.