BOY, do I feel stupid. Thank you Mr. Backtrader! :)

BOY, do I feel stupid. Thank you Mr. Backtrader! :)

I've managed to get a custom indicator to work. I'm able to interact with it in my next(self) function.
Only problem is, it will not plot on the main plot, it only plots on a subplot (I really want it on the main plot).
I feel like I'm losing my mind over something so simple. Help me please.
Code below:

import backtrader as bt

class indmax(bt.Indicator):
    lines = ('max')
    params = (('period', 250),)
    
    def __init__(self):
        # pulled this bit from the backtrader stochastic rsi source code
        hh = bt.indicators.Highest(self.data, period=self.p.period)
        self.lines.max = hh

In my strategy, I reference the custom indicator like so:

class HelpMeStrategy(bt.Strategy):
    params = (('maxperiod', 250),)

    def __init__(self): 
        self.stratmax= indmax(self.datas[0], period=self.params.maxperiod)

Doing the these steps with the existing backtrader sma indicator yields a plot on the main plot by default, but not my stupid custom indicator.

Thanks,
Sam