Cisco Spa500s Sidecar brackets by thesavo on Thingiverse: https://www.thingiverse.com/thing:5207574

Summary:
This is a work in progress. Not all files are requiredUPDATE 2022/01/21 - Foot file updated - adjust detente clip widths.Split foot files removed - You can split the stand/foot in your slicer.  FileListcisco_Spa500s-BRACKET.stl - This is joiner Bracketcisco_Spa500s-Foot-full.stl - this is the foot/stand as a whole print.  Overall:These are for mounting a Cisco Spa500 or SPA500S to a Cisco SPA540G IP phone.I modeled these parts as I bought a sidecar attendant that had no accessories other than the thumbscrews. Part1:This is the joiner bracket. I designed this in tinker-cad with only a measuring caliper and pictures of the part. This is not a remix. You can use a standard VESA mount M4 screw in the threaded inserts in the device.M4x12 max.  The printed example is using one OEM thumb screw and an M4x10 VESA screw.Part2:I am still working on the stand/foot part.These are not completed yet. YMMV.  I am working on 2nd version that uses the bracket holes for a  2nd unit.  This should print faster but will prevent you from mounting a second attendant console. Note: the foot is a remix of Cisco VOIP Phone Stand HH-M1-1. I clipped the detente points and squeezed the item to fit the needed with.  I then shrank the detente points and re attached.https://www.thingiverse.com/thing:3630300