Rpg Maker Developers Group

So I am attempting to make a GUI for Frog's Health plugin found here.(You will also need the core plugin to run it).
Information on this plugin can be found in this thread.
I am using SumRndmDde's Hud Maker, found here. (You will also need his core plugin to run it)

In SRD's hud maker you can add a value to be used as a bar. For example, for leader's health you can use $gameParty.leader().hp as a value and it will show that as a guage on screen.

What I'm attempting to do is to find the value of the added "needs" that frog health lets you make. For example, if you make a need called health in the plugin manager, I'd like to find the syntax for that to push to the hud maker so that I can show its value on screen.

In a thread about the plugin a year ago, I asked frog if it was possible to make a hud with it here.
He said "If you have a HUD plugin, you should be able to configure it to display these Health HP just the same as regular HP, MP and TP. I'm almost positive that SRD's HUD Maker would allow you to do what you're looking for here. There are probably other HUD plugins out there that would work as well. RPG Maker itself doesn't have a way to create a HUD and it was a bit out of scope for this plugin."
And looking at, it should be doable, I just don't know what value to put in, or how to find it, to add it to SRD's Hud maker.

I've been trying on and off to figure this out for a year now with no luck. If anyone could help out, I'd greatly appreciate it!