[Typo3] menu and plugins all on the left?

[Bing Du]

On the left side, I want to show the mainmenu first and below that 
insert a plugin.  I can use the following to display either the menu or 
the plugin.

subparts.nav < temp.mainmenu
subparts.nav < styles.content.getLeft

But what should be done to grab both, using COA?

Appreciate any help,

Bing