How to hook up DiSEqC switch to 2 LNBF's

[looksw]

Hi there,

I have a motorized system and want to add a circular LNB to the original universal LNB. I have a 4 to 1 DiSEqC switch and a Circular LNB. Where do you put the switch? Before the motor or before the LNB? Also will I have to modify all of the satellites I am presently using to use the DiSEqC switch? The options on the receiver are: Off, ToneA, ToneB, 1,2,3,or 4. The circular LNB is working, I used the cable going to the original universal LNB and hooked it up to the circular one and got some free radio stations and a couple of tv channels.