You want to avoid changes to the oil tank lines, those threads are something like M22 and M26 Japanese Parallel Thread and it is easier to leave it be than to find or even make adapters.
Routing from the oil filter adapter is the most common solution. Of course, there is opinion that oil cooler from the filter can lead to oil starvation at the top (head) of the engine and that's not a good thing.
Personally, I dont think oil cooler is needed, but you are the one to make the call on your machine.