Manasara 9.148

9.148

piturdvāraṃ tu tatpratyagvāyordvāraṃ tathottaram
pūrvapaścimayordvārau tat sūtraṃ tu yojayet

the western gate is in the southwest, and likewise the northern gate is in the northwest. / One should join the measuring cord between the eastern and western gates;