You can wire this up from your corners, the 2nd lead on the 1157 bulb should be always on. You can probably spare the wattage just running it right off that circuit without changing anything provided you use a low (10-15W) bulb.
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Hot: 2001 Estoril M Roadster
ZCP 19's michelin supersports, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 18's w310's,
Fun: 2006 YZF-R6, black, ohlins, pazzo, cat delete, vance hines csone, YEC racing tune