Question about Glogo

hello
I assemble my glogo and I have this little plastic piece in the glogo kit ... and I do not see what it serves?
I do not see it in the manual
if anyone can tell me ?
thank you

Christophe of France

It's a handy little wrench to hold the tail control rod end cap as you thread in the ball link.

Thank you
and thank you also to Kyle Dahl who answered me also