physical presence button of T3-4 and T4-4

Hi experts

I have one quick question, would you tell me where physical presence button of T3-4 and T4-4 is located.

I find the button on T3-1, T3-2, Netra T3-1 and Netra T4-2 in any related documents below, but I could not find the button info for T3-4 and T4-4 yet.

T3-1, T4-1
docs.oracle.com/cd/E22985_01/pdf/E22988.pdf    page 6

Netra T4-2
http://docs.oracle.com/cd/E21893_01/html/E21894/z40007a81045077.html

T4-2, T3-2
docs.oracle.com/cd/E19166-01/E20794/E20794.pdf   page 34

Netra T4-1, T3-1