Topband: Ground connection for series-connected RG-400/#31 common-mode chokes

[N4ZR]

I've just finished winding two 17-turn RG-400 common mode chokes on #31 
cores.  My thought is to series-connect these for adequate power 
handling at the base of an inverted L on 160M.

My question is, where in this lash-up do I connect the shield of the 
RG-400 to the ground radial system - at the SO-239 where the feedline 
comes into the box (before the chokes) , or at the end of the second 
choke that connects to the inverted L, or ???

-- 
73, Pete N4ZR
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