Seeking wall mount for Boston satellites

I have Boston MCS 100 satellites and want to wall mount them with articulation,the problem is I purchased a pair of Omnimount 20lb mounts but the stud that comes with the Omnimount 20.0 is wayyyy to large for the Boston sats,any recommendations on what would work?

I attached a photo showing the Omnimount 20.0 package aside the MCS100.

Thanks!