I've got a 45-ton with the built in dcc decoder.

I've detached the onboard decoder, but how can I solder the wires from an aftermarket decoder, without the wires touching the adjacent pads? The pads are incredibly close together, as can be seen in the exploded parts diagram included with the loco:

http://www.bachmanntrains.com/home-usa/dwg/dwgs/85201.pdf

Should the wires simply be "strung" through the holes, and taped with Kapton, no solder used?