Apparently the cells ends have a coating on them that allows regular 60/40 to stick so you just want to scuff them with the Scotchbrit pads and not hit them with a dremel like you might with Ni-xx cells.
On a quick search I found this for flux.
https://www.tanicpacks.com/product_i...de75ebffe1db49
if you want to order some up just bill me for it and your welcome to whatever is left.
"If yer not 1st,yer last"
OFNA GTP w/Quark-Medusa 60mm-5s
Inferno SP2 w/MMM-1512 2.5d-5S
Inferno St-rr w/MMM-1515 1y-5s