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.
I run a canadian led kit & hid kit company, if you have any questions about led headlights or hid kits in canada or would like to check out our products please contact me here: http://absolutehid.ca
2002 TiAg M3 6mt
deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 220M 19's, Michelin Supersports
2006 YZF-R6, bunch of go-fast stuff