Synthesizer modulation help

Hey everyone, this is my first time programming with max, i am attempting to create a simple analog style subtractive poly synth. I have everything set up right now, except for two crucial things; modulation lfo section and an oscillator control section with waveform selection.

I have the sound generating oscillator set up as a poly object as described in a tutorial video i found, it uses a saved max patch in combination with a poly object for my voice and then multiplies it to add more. Since my actual oscillator is set up in an external max patch, how would i incorporate a waveform selector or add vibrato modulation to it from my actual synth patch, having knobs available via gui?

here is my patch, it's a bit unorganized underneath, but hopefully you can see what iv'e done. i already have 4 lfos created and hooked to the filter cutoff, i just need a button to add in the ability to route the lfos to the oscillators for a vibrato effect like an analog synth would have.

any help is appreciated!