Non Factory main bearing bolt torque.

My Mopar performance windage tray attachment main cap bolt kit showed up from Mancini today. It was packaged by Mopar in a bag that said Mopar and made in the USA. Hopefully it's still made by who ever used to make bolts for Mopar. I'm going to torque them to 85 foot pounds per the advice I have gotten here. One thing strange to me, the washers that came with the kit for between the main cap bolts and the main caps are concave. I suppose you could call them convex depending on which side you install them on. I'm not sure which side is supposed to be towards the bolt and which side is supposed to be towards the main cap, but if I had to guess I would say the convex part goes towards the bolt and the concave part goes towards the main cap. I have never seen this style washer before and so it gives me some pause. What do you guys think?