Should there be an "approved standard" way for someone to post, a link from one board to another to say, "this is important here / but it's also important there go to this post to discuss more"
I don't know about an "approved standard", but put can manually include links of similar posts to yours which is in another thread, if you feel the discussions would be more appropriate there. This would redirect those who visit your board to the other.
But as you said;
I think that where I have it is better, but I do see the argument for having it under service discussion.
You feel your post is in the more appropriate section, then this would need the other user to redirect.
I doubt the moderators would take action on this, there are usually sufficient boards to cater for different kinds of posts