It depends on how you will route the fan cable. If it's directly (shortest point from exhaust fan to the bottom right of mobo), then, yes, the cable is long enough. However, if you plan to route the fan cable to the upper left hole, to the back of the mobo tray, run diagonally to the nearest bottom right hole of the case, and out to the bottom right of the mobo, then, there is a chance it won't reach. In this case, you can get a fan extension cable, like this:
https://www.amazon.com/3-Pin-Extension-Sleeving-Connectors-Length/dp/B00C46K88M/ref=pd_sim_147_4?_encoding=UTF8&pd_rd_i=B00C46K88M&pd_rd_r=XQQRXASPPQ99EHP6DFEM&pd_rd_w=2rY4B&pd_rd_wg=Ew5zI&psc=1&refRID=XQQRXASPPQ99EHP6DFEM
You can also get a fan splitter (https://www.amazon.com/Splitter-Extension-Sleeving-Connectors-Length/dp/B00C46DX4S/ref=pd_sim_147_1?_encoding=UTF8&pd_rd_i=B00C46DX4S&pd_rd_r=JY57M619M5MDDW7F9N6E&pd_rd_w=SCUR2&pd_rd_wg=zgHOn&psc=1&refRID=JY57M619M5MDDW7F9N6E) or fan "hub", such as the Deep Cool Fan Hub (https://www.amazon.com/DeepCool-FAN-HUB-Cooler-Powers/dp/B008YD7B0M/ref=sr_1_1?s=electronics&ie=UTF8&qid=1497487484&sr=1-1&keywords=deepcool+fan+hub), to be able to connect additional fans off of 1 fan header, if you wish to fill up all the fan mounting locations of your Spec-02 (since you only have 2 SYS_FAN headers) with the fan cables just running a shorter distance. Make sure though that when you connect several fans, to take into account that the total amp draw of all the fans should be ~0.75A for safety. You can check the amp draw of the fan by looking at the sticker label at the back of the fan itself.