YouTube name: X2an.
Date: May 14, 2011.
City: Stockholm (Sweden).
The video shows
Storstockholms Lokaltrafik (SL)
Stockholm tram line 30 Tvärbanan (ex 22 Tvärbanan)
Stockholm low-floor articulated tram 424, type A32, interconnected with:
Stockholm low-floor articulated tram 419, type A32.
In the end station of line 22, Sweden, Stockholm, two trams couple. You can see how you equip the coupler and couple!