This photo is the only one in the website that seems to be taken from the Southern part of chongjin, with the disconnected trolleybus route.

41.7259253884491, 129.71001247042804 looking northeast

I marked the location of the photo and added a new depot "Ranam" where the bus 239 must be stationed. The northern two trolleybus routes are not really connected either, but the photos and vehicles are all intermixed, I don't know if the buses are moved between routes for maintenance