Connecting these two bracket parts help

  1. lynxmotion.com/p-286-aluminum-multi-purpose-servo-bracket-two-pack.aspx

2.lynxmotion.com/p-326-aluminum-long-c-servo-bracket-two-pack.aspx

I haven’t bought it yet, but I was wondering. when i place the servo between, do I need to buy any other parts such as bearings or some kind of spacer to connect the underside(side without the horn) from the multi bracket to the c bracket ? because all the images online show that the c bracket is connected on the horn all fine and good but what about the underside of the servo how is it connected ?

We suggest the following C-bracket instead:
lynxmotion.com/p-401-aluminu … -pack.aspx

Assembly would be similar to this:
lynxmotion.com/images/html/build083.htm