Moto Guzzi V7 Sport, 750 S, 750 S3, 850 T, 850 T3, 850 T3 California, V1000 I-Convert, V1000 G5, 1000 SP, Le Mans, Le Mans II, Le Mans CX 100, Le Mans III, Le Mans 1000, 1000 SP III, 1000 S, California II, California III, California 1100, California Jackal, California EV, California EV Touring, California Aluminium, California Titanium, California Special, California Special Sport, California Stone-Metal, California Stone-Touring, California Classic, California Touring, and California Vintage models
850 T front wheel
Of the wheels I've seen, the brake disc is mounted on the side of the rim which has the Borrani markings stamped into it (right side when fit to the motorcycle). The brake disc receives the thicker of the two spacers/bearing carriers.
850 T rear wheel
Thanks to Charlie Mullendore of Antietam Classic Cycle for sending this information to me via email. In Charlie's own words
Photo attached of the bearing and spacer setup. The longer side and collar go towards the rear drive (but you already knew that). Thought a photo might be helpful as to how it comes apart seems to be a recurring question on Wildguzzi. I used a 14 mm socket as a drift to drive the spacer and drive side bearing out, then a chunk of 1 inch diameter brass to drive the brake side bearing out.