Assembly is very easy, it takes no more than 5 minutes and you're ready to have fun with your dog, in complete safety, and with both hands holding the handlebars.
 

Parts list:

(1) Snap Link
(2) Cord
(3) Bullet like Terminal
(4) Compression Springs
(5) Aluminium Pole
(6) Rubber sleeve
(7) Back Fixing Jaw
(8) Front Fixing Jaw
(9) Screws
(10) Connector
(11) Quick Lock System

After opening the packaging, separate the two parts of the fixing jaw (7) and (8) from the tubular bar (5).

Position the two parts of the fixing jaw on the saddle holding pole, slightly tightening the screws (9). Allow the jaw to stay in position, but still free to be adjusted.

In case of non standard seat post diameter (or simply to avoid scratches), wrap the rubber sleeve (6) around the post before tightening the jaw.

Hook up the tubular bar (5), orienting it to the back of the bike at an angle of about 20 degrees.

Tighten the screws firmly and make sure the quick lock (11) is completely engaged and you are ready to go.