Replaced tank

[Patrick]

Hello all. I recently acquired a gz250. I ordered a used gas tank off of ebay to replace the one that was on there since it was in bad shape. I thought the tank I ordered was the same but there is one difference. There is one less place to attach a hose. I read no mention of this hose in the manual and am wondering if it is something that is on California bikes that aren't on all others? Will my bike be okay if I just attach the two hoses at the petcock and pretend the third doesn't exist? I can't really tell where the hose leads. Thanks for your time.