Is that a serious question? Obviously, if there's a leak, then you need to find out why it's leaking & fix it. If you need to ask how to fix it, maybe you should not be doing the job yourself.
The two plugs I mentioned are threaded, they can be unscrewed and removed, you remove them if you need to remove the jets - they might be leaking because they are loose, they might be leaking because the gasket (it looks like a metal washer) behind them is damaged - you need to look at them and figure out, based on what you see, IF they are leaking, WHY they are leaking, and WHAT needs to be done to fix the leak - if this is not within your skill set, you need to find someone to do it for you.