*This is for a MY03 wiring harness
If you look at the WRX wiring diagrams, you will note that connectors i10, i11, and i12 pertain to the gauge cluster (relevant to my swap), i59 goes to the in-dash clock (used just as an example), and i1 and i2 go to the bulkhead wiring harness (which is relevant for all).
-Jon