Replying to Mounting skis for the first time?

So I watched a video on Youtube and and I feel I can mount the skis myself, however I have a query im planning on mounting a pair of Tyrolia Attack 13 and want to mount them on my ARV 96 16/17, I ride pretty much just park, so I'm planning on having my skis true centre. Can someone clarify that the true middle of the ski, is not the recommended mounting point by ski manufacturer but the exact centre of the ski? and that mounting the ski true centre is correct ounting positon for riding park. I'm fairly sure, I'm right but just wnat to double check before i go mount them. cheers