High contact, low adhesion, easy.
Take a wire, cut it in two, strip wires back 1cm, overlay exposed wires, don't twist together.
Take lightly oiled paper and apply to 1 side on the covering and heat-shrink the whole.
The connection is made and enforced by the heat-shrink and the oiled paper ensures that the separation of the 2 wire-ends enclosed is eased. A little tinkering with the heat-shrink maybe required to validate tensions.
For safety, to avoid exposed wires touching, repeat the process for the other wire, but place the oiled paper on the opposite covering and ensure the 2 wire cust are offset by 2 or 3 cm.
For each side of the junction, you are left with 1 exposed wire end and 1 covered end, offset from it and the weight added to the whole is neglible (gms).