Re-Wire 3 Switches to 2

Hoping someone can help me figure out the wiring in my garage. I have 3 switches in my switch box: a single pole switch on the left which controls recessed lights outside my garage door, and 2 switches on the right which I'm not sure what they do. I believe one of them controls a driveway flood light, which is how I found this wiring because I replaced the light and found there was no power coming to it at all. Attachment 49873 (http://www.doityourself.com/forum/attachments/electrical-ac-dc/49873-re-wire-3-switches-2-20150426_170304.jpg) So when I opened the box, this is what I found. Attachment 49874 (http://www.doityourself.com/forum/attachments/electrical-ac-dc/49874-re-wire-3-switches-2-20150426_192250.jpg) From left to right, the 2nd and 4th cables are the ones bringing power in. The 1st cable is going to the recessed lights, which work fine. The 3rd cable is the one I think goes to the flood light, but my voltage tester can't detect any power when flipping any switches.