We can offer the seat installed on your urban arrow for 16€/month as part of our accessory offers
If you decide to purchase and install it yourself, here the instruction to do so:
Purchase the seat, example here from KidsCab (not affiliated):
Purchase the adaptor seat for Urban arrow, still here from KidsCab (not affiliated):
Kit montage pour siége bébé coqué dans Urban Arrow
Here the installation instructions:
Accessories | Melia children's seat
Beware:
Welgo can only guarantee the installations when done by Welgo.
In case you decide to add the accessory yourself, all damages caused to the bike during the installation or usage of the seat are in your full responsibility and not covered by the insurance included in the subscription.
Also you bare the risks of a potential issues resulting from a wrong installation for your passengers.