Lance Wiring On New Truck

I traded in my 2011 Sierra 3500 Dmax on a 2018 Sierra 3500 Dmax and am going to install the Lance plug and wiring on my new truck but there isn't a trailer battery post by the engine compartment fuse block on the 2018 like on the 2011. Is the best option running the 8 gauge cable with an inline fuse to the battery or is there a better place to connect battery power?