Hi where exactly should I be putting my cash for this, I’ve deposited again but not sure where it should sit in?
Hi 
If you’re referring to the interest on uninvested cash - you have to enable the feature. To do so, login to your account, tap on Interest on cash, follow the instructions and tap the ‘Enable’ button. You should consent to hold your cash in qualifying money market funds (QMMFs).
Yes I have done that I’m talking of WHERE in my account should I keep this cash?
No matter where you keep your funds within your account, whether in the main pot or the spending pot, you’ll still earn interest on the uninvested cash.