I did check out uscartool.com, but I couldn't find any information on connectors for a 69 b-body (only e-bodies and 71-2 b-body).

They do seem nice, and if they are available for a 69, I would definitely give them serious consideration, even though they are nearly 10x the cost of a length of 2x3. The almost-factory look and no need to worry about hacking the floorpan may be worth it.