Using multiple hardware devices

Hope someone can help!
I’ve recently upgraded my studio gear, i wanted some rack mount equipment, so i bought the POD HD Pro X, i bought an Eleven Rack, and a Rocktron Intellifex LTD, i have reasons for buying these units, and want to use specific settings on each unit, the thing is, how do i use them simultaneously, i have the Pod HD Pro X plugged directly into my Aux inputs on my MOTU interface, but dont want to have to unplug the leads from my Pod, to put into say my Eleven Rack when i want to use that, is there away of plugging all the hardware units into one unit, and then running that into the Aux inputs on my interface?!
Sorry, totally new to all this, so please bare with me!
Thank you