First of all, for the Insight and Perception modifiers to be +0 you also need a Wisdom of 10 or 11 and to be level 1 (or level 2 or 3 with 8 or 9 Wisdom score)
But let's suppose it's really +0. You don't really need to write them down since it's so easy to calculate them: just add 10 to your skill modifiers and you have them.
My D&D 4e sheet has some space for them in the third column, under the senses header where the type of vision is also specified. I'm not familiar with the sheets you're using but My suggestion is to fill everything you find and if you find nowhere to write them, just decide where to write it (the notes section is a great place IMHO).
It could be useul to decide this place togheter with other players so that each one of you writes it in the same place, so when anybody forgets where it is the others will be able to tell him.
It's also worth noting how this value never gets rolled. It'd be better if your DM got a list of the passive insight and perception values instead of letting you keep them, since no real imput is needed from you when he must check against these fixed values.
On a separate note, the misc. column is intended for other bonuses to your skill, which end up making part of the passive skills total too. It's better if you use them for what they're meant for - you don't want to forget what that value is and add it to your active rolls next time you check your math.