Josh - I haven't fitted it yet, but will put up some detailed instructions and photo's when I do.
As for connections, Greywolf has already given some great details. The block I have bought has two common positive rails though, each of 6 connections, so one can then be direct to the battery (So Alarms, Optimisers etc) and one can be relay switched for utilities (Heated Grips, GPS etc). The grounds are common.