I think for that distance of run and the Q's will be fine after reviewing Roger Russel's wire table.

http://www.roger-russell.com/wire/wire.htm#wiretable

I had to splice some wires myself recently and found some solder connectors like these below at my local home improvement store. Just place the wires on both sides untwisted into the center, heat and the built in solder fuses around the wires.




M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85