/etc/pekwm/config is in pekwm 0.1.17-1+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | INCLUDE = "$_PEKWM_ETC_PATH/config_system"
Files {
    Theme = "$_PEKWM_THEME_PATH/default"
}
Screen {
    Workspaces = "9"
    WorkspacesPerRow = "3"
    WorkspaceNames = "01;02;03;04;05;06;07;08;09"
    Placement {
        Model = "CenteredOnParent Smart MouseNotUnder"
    }
}
 |