No special access issues
Approach from Pello: Drive along road 83 (in direction of Rovaniemi) and turn right to Lankojärvi Itäpuolentie. In some time you can see a telephone mast on left, higher up. That's where you want to go. Preferably park car on unpaved road before just before steeper uphill - if you decide to drive all way to up, go with speed or no success.
Walk straight away from parking and you will end up at the left end of the wall, short walk.