What is this display connection?
It is considered unlikely that one 40 pin TTL LCD interface is just like another.  Both the electrical and the timing have to be considered.  That said, this LCD TTL break out board may help.

Assuming you want to interface the screen to a Raspberry Pi, consider this LCD TTL interface board. However, again, it is considered unlikely  that one 40 pin TTL LCD interface is just like another.

In addition, you will need to make software modifications to the Raspberry Pi operating system.  Interfacing directly with a 40 pin TTL LCD will both consume nearly all your GPIO pins as well as some of your processor power.  The instructions for the software modifications are linked to this web page.

Finally, consider buying a 40 pin TTL LCD that is known to work with a particular interface board.