How do I add "honoree section" to new contribution form in the backend?
Here is the solution that I've come up with: first, we created a custom field set for "Honoree Section". We then create two fields in the set (or as many data fields as required for your application). In my case, 1) radio selects for "honoree type" (two types, "In Honor Of" and "In Memory Of") and 2) a text field for the name of the person memorialized with the gift.

Next we create a custom profile for contributions called "Honoree Section" and use the custom fields.

The searchable profile data can now be entered into the backend along with the soft credit. Also, the soft credit can now be entered for the family of the deceased, whereas the contribution can be "attributed to" the deceased (searchably connected to the deceased via the custom profile).