The proposal for the totem design is for them to be placed in the axis of the platform, immediately after the entrance stairs.
The totem's construction follows the already existing specifications of the tourist information wayfinding totems. They have a very balanced width to height ratio. This allows for the totem to be space efficient in the space deficient platforms.
The current station is indicated by 1) showinf the full lenght of the lines, servicing the station and 2) "splitting" the station count lines on the current station. This allows each "half" to be visually related to the arrow directions avobe the station count, showing the terminus.