Like I said earlier guy's pi$$ easy to do...
number of ways...
1. Depending if you have front "LEXUS" scuff plates then simply connect to them.
2. Have it wired to the ignition barrel and dome light i.e. when you open the doors or use the remote the light will come on. I have done on this.
Nothing to it... drill holes (only two), lose wire and connect to the relevant wire.
Bazz and Maz you have a PM