[Konstantinos]

Add them anywhere, but outside of any callback/custom function and under includes/defines.

For example:

pawn Код:

#include <a_samp>
// more #include ...

// #define ...

public OnPlayerConnect(playerid)
{
    // some code
    return 1;
}

// other callbacks

public OnPlayerStreamIn( playerid, forplayerid )
{
    if( gTeam[ playerid == gTeam[ forplayerid ] ) // CHANGE THEM TO YOURS
    {
        SetPlayerMarkerForPlayer( forplayerid, playerid, GetPlayerColor( playerid ) );
    }
}

public OnPlayerStreamOut( playerid, forplayerid )
{
    if( gTeam[ playerid == gTeam[ forplayerid ] ) // CHANGE THEM TO YOURS
    {
        SetPlayerMarkerForPlayer( forplayerid, playerid, GetPlayerColor( playerid ) );
    }
}

Make sure that you set the color before, when they choose their team. And change gTeam to the one you use for storing the player's team (unless it's same).