How do I add custom plugins to the loot table?

Sorry, I didn't get exactly from the description how to install the custom plugin items into the loottable. 

For example, I have EpicLoot plugin - how do I add those items?

I can help with this, as I have added many custom items with success.

Preferred Method: 

You want to start off by clicking the "New Custom Item" button at the very top of the /loottable gui. 
*See attached Images*
  

You will be presented with this ui:


You can find all the Item IDs at corrosion hour or rust labs for the item you are trying to add.  
Here is an Item ID for a M249 for reference: -2069578888

You need to know the base item that the custom item is using. 
Epic items use their base look alikes
Ganja uses sticks
Bag of holding uses halloween bags
Epic scrap is just skinned blood
Etc.

The 2 most important factors for your custom items are: Skin ID and Display Name. 
Some plugins prioritize one over the other.  
IE: 
ganja.    - > you MUST use the correct skin id, otherwise you will be left with sticks and no functionality. - you can change the display name to anything. 
Epic Items -> Uses Display name ONLY,  skin id appears irrelevant. unless you are filtering/blacklisting
It is important to know how the plugin is creating these items so you can properly add them into the loot tables.
the plugin description page should give you all the information you need. 

Once you have added your custom item to the plugin, you can add it to a loot table by selecting it from the "Custom" tab when selecting items:


ALTERNATIVE METHOD:

- Click on "add Item" and enter the details for the item you wish to add
- Enter the Display name as it should be for the custom item. 
- Enter the desired (or required skin) for the custom item
- Set quantity and rarity as usual
-> I will include an image to showcase what an epic item looks like being added, as well as epic scrap:



The above settings will give you an epic M249 with the operators buff, but it will appear as an unskinned m249. 
Simply change the skin id if you want it to look different. 
Epic items require 2 specific Name points; 1 the set, and 2 the modifier.   so Operators and [s 0.15]
You can name it "Operators pencil [s 0.15] if you wish but the modifier must be typed as I have shown it. do not include a capital in the [s 0.15]. 
You can change the lowercase s to any other quality tier in your config (by default a, b, c, s) 
If you change the name Operators, it will give you a different set item providing it is spelled correctly. 

Now to add epic scrap:


OR 






CAUTION WITH NAMING CUSTOM ITEMS!!

Make sure you match the spelling and capitalization of the custom items appropriately!
If you name epic scrap in lower case, but the plugin uses upper case... 
The epic scrap will still work, but it will not stack.  
This is not always the case, sometimes the custom item wont work at all, so be thorough.