using pitch sliders to control ICST ambisonic monitor, confused

i have created four granular samplers, each accessing random wav files at the users discretion. Using an xbox controller i want to use the thumb sticks to manoeuvre these grain clouds around an 8 channel array. (using 1st order ambisonics). The speaker set up is flat to i am only working on the w,x,y.

i have employed a simple switching system using the shoulder buttons to start and stop new loops, while selecting which granular engine is being used. Realistically two can be used at a time.

However i am a little stuck in how to link everything together. i Know the pitch-slider outputs on the x,y but i don't know how have both thumb sticks controlling two separate items on the ambi monitor.

below is a small patch showing how the thumb sticks work.

i've been scratching my brain for a while about this and any help would prove invaluable.