Spade's Or Banana's on Double run from Integrated

I have pretty much decided to do a double run of the Harmonix SLC from my MBL Integraded to my Montana EPX's.
I already have one pair of the SLC's in spades which I will run to my upper end, but on the second pair for the low end
coming off the same post on the Integrated should I double up on the spades or can I go with Banana's from that post? Speaker end will be spade's.
My concern is getting the spades doubled up and "SECURED".
I would have to bring one run up from the botton and the other run down from the top which is no problem.
I tried this today and it will work but being and staying secured is a concern to a point.
Banana's would be no issue but then I don't know if I am losing anything in way of current contact.
I tried this double run just this afternoon with another cable I have for audition and was just blown away with what I heard.
Thanks for any input you may give me.
Dave