The title says it all…
I have no idea how to add helper plugins in plugins.js. Should I just copy and paste their content? Probably not…
Regards,
-jj. 
ik you have extra jQuery plugins,
just Coppy paste them all in that file.
It will be loaded before script.js and after jQuery.js, an the reason to have just 1 file is becouse evry request takest time the less individual requests the better