The left hand is friction and sets up like older Record shifters. Yours, unfortunately, has the look of a too large cable head stuck in it and those are a true challenge to get out. you might want to check into that first before expending a lot of effort setting it up. Here are some links that might be helpful. I assume the springs on yours are present in the body of the shifter. It's been a while but I've set up a few sets of these and I used some combination of a small flat head screwdriver, sometimes put the sleeve in reverse to hold in place to get the gear insert mounted inside the springs. Boulder bike had a set of inserts for cheap not too long ago if you need a different one.
http://www.cadre.org/bike_stuff/Camp...moresyncro.jpg
Campagnolo Syncro II shifters ~ tears for gears
Syncro Tips and Tricks ~ tears for gears
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '95 Gios Compact Pro, '95 Carrera Zeus, ‘81 Masi Gran Criterium, ‘81 Merckx Pro, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, Rivendell Rambouillet, Heron Randonneur, ‘92 Ciöcc Columbus EL