How to locate the Power Pads on a MacBook Pro A1398

My mac will no longer power up via the keyboard. I have taken the back off and have it before me with the fans at the bottom and the batteries at the top. How can I jump-start the Mac ?

I have tried to find the Power Pads but to no avail.

I have also read about shorting pins #5 and #29 of the keyboard cable but unsure where this is and which pins exactly to short.

My question is how to start the Mac using either method above or another.

I managed to do this shortly after posting the question. Shorting PIN 5 of the keyboard connector (5th from right with the batteries at the top) with GROUND works. However I could only get it to work with the screen opened.