Hi, for the purpose of installing a seat heater (two surfaces per seat!) in a Smart ED 451 (BJ 2012) I am looking for ignition plus (clamp 15) in the footroom area, which is quite high secured (> 200W) and where a simple ring cable shoe can be put on. Is there a good place? BTW, how much electricity can I carry over a power thief? Thank you in advance!