does anyone know a cheap and simple way to do this? I want to just wire it into the fuse box but not exactly sure how and internet searches arent helping very much.. help would be much appreciated thanks!!

 

There's an empty + switched(ign) slot in the fuse panel... Look at the fuse panel cover and it will show where it is.. Just use a fused wire and wire into that... There's also an empty + constant(bat) supply slot, so make sure you check that you're using the switched one.