Having trouble finding any info on it, closest i got was this but cant see behind to have a good look at the connections.
So what you're saying is you dont have room for the speakers and want to try replacing them with slim designs?
Not sure how much room you have to play with so i'll guess you have no room at all for your current speakers beside the unit. Have you thought about maybe raising the speakers on stands or shelving or wall mounts? Might not have room at floor level but up higher maybe?
Floor stands
http://www.amazon.com/VideoSecu-Adjustable-Satellite-Sp...
Wall mounts
http://www.amazon.com/VideoSecu-Clamping-Mounting-Surro...
A pair of wired Satellite speakers might be ok, can easily have these on wall mounts. But as for the sound quality will vary on speaker driver, box casing and material its made of. Stuff like this need to hear it in person, no good trying to make a decision on paper.
http://www.amazon.com/Polk-Audio-Satellite-Speaker-Sing...
A lot of satellite speakers use RCA connections at the back which you can still get around using speaker wire conversions like;
http://www.amazon.com/IEC-Speaker-Wire-Pair-Males/dp/B0...
Just some ideas, best to go to a speaker store near you and get some advice from someone who is in the business.