Denis,

the bolts are long because i am using a piece of plastic conduit to offset the switch - without the offset, the red "key" sticks out too far and is cutting into the spare tire space and can touch the cargo "subfloor" cover. by pushing the "key" deeper into the cavity, you need longer screws... you also need to account for the wire that holds the "key" and that wire is fed through the one of the mounting holes of the switch, thus reducing the available diameter of the hole... the first set of bolts was fitting through one hole, but would not fit through the hole with wire holding the "key"... so, i went for a bit thinner bolts... I also used the self-locking nuts with the piece of plastic inside the nut, to avoid the thing from unscrewing...
I also hammered out the 90 degrees angle on the eye of the terminal because the angled way would not squeeze into the cavity...

very simple install...