Electronic – DB9 male or female Connector in Board

I believe you are asking which specific wire goes to which specific pin, based on the wire color. If that is correct, I'll try to give you some guidance, but I must also warn you that although there is an accepted standard for wire colors on DB9 and RJ45 connectors, it is also common to find them with non-standard wire colors. So think of this as more of a rule of thumb, rather than a certainty.

DB9_Wire_RJ45

1 N/C_Green_5

2_Black_3

3_Yellow_6

4_Brown_7

5_Red_4

6_Orange_2

7_White_8

8_Blue_1

If this is not what you are looking for, please clarify and I'll try to help you.

Often the connector side that is "live", having voltage present on it while not plugged in, will be female/sockets and the mating half will obviously be male/pins. It reduces the chance of shock or shorting. Small signal stuff doesn't matter so much, but with power connectors it's more important to keep live contacts inaccessible.