What John says, just tin the ends, lay them side by side overlapping about 1/8 inch, reheat to flow the tinned ends together, cover with heat shrink and you are good to go. The solder joint will be plenty strong, no need to worry about hooks, weaving wires together or such nonsense. If it is a typical 72, 27 or 6 meter antenna, a final length anywhere between 39 and 41 inches will give you full range.