How to spawn a battle member to a designated spawn point (non-combat area)

If you only have your player spawned in the field, you can spawn the rest of the battle group members using a Spawn Group Members node. To place them at other locations, set them up as event actors using the Member actor type (note that Member Index 0 is the leader, i.e. usually the player) and use Change Position nodes to place the individual actors where you want them.
E.g. using this in a menu screen, you can set up a game event that does this and use it as open event for that menu.

If you just want to display their models somewhere, you can also use the Prefab View Portrait feature to display a prefab as a portrait.

Prefab view portraits are, well, portraits that can be displayed in dialogues, menus or HUDs. It uses a camera, render textures and spawning the combatant's prefab somewhere way off screen to display them as images in your UI.

The base settings for prefab view portraits are made in Menus > Menu Settings, the Prefab View settings can be found at the bottom.
To set up a prefab view portrait for a combatant, add a portrait in its settings and enable Use Prefab View in it. Make sure to e.g. have all prefab view portraits in their own portrait type :)