i finished it and it work fine (very plaisant to have it), my new 3 LFO is a very slowly one like Sloth Chaos = long period of no quantiz .
but this is an old history now !
thx @eric for the idea to put it directelly on the PCB without stripboard, it’s made in 10 min and easy to add.
and a little hot glue et voilà 
for more info, i had allready finished my module before the add, and i don’t use euro/kosmo power socket, so a little of hot glue on my wires.
So i connected the +12 & -12 on the output of the power diodes.
The +5V on a jack socket (CV2).
after just connect IN1 to the Jack IN1 of Quantizer
and OUT1 connect to the wire which was originally connected to IN1 jack of Quantizer.