company invoices from director - Accounts Payable

[Finance (Marc)]

Good afternoon, 
I have what is really an accounting question, but I can’t find the answers in my book-keeping textbooks (probably due to still being very much a neophyte).

I have formed a private limited company here in Scotland, but shelled out some money on my personal credit cards for it before it was actually incorporated.  In the accounts, I am trying to work out how to best record money I have shelled out until such time as it can maybe pay it back (or write it off as a donation from director).

In my accounts structure I have various ‘Liabilities’ accounts, but I also have Accounts Payable.  My question is: for each invoice I’ve raised from me to the company, should I post these under Accounts Payable (with a corresponding cross-post to Equity - Opening Balances, because we’re waiting on the bank account), or should I be chucking them under an insecure liabilities account?

Can someone advise me on the practicalities:  what are the two accounts for these types of transactions?  I understand double-entry accounting; I just can’t seem to work out what the right mix is for these…

Thank you,
Marc Johanssón.