Saved Paypal Donate button

How can I use a “Saved Paypal button” on the bottom of donation forms instead of the default button on form. I am given a code on paypal website but I have nowhere to put it on plug in because it only asks for paypal email.

http://www.radioaleluya.org/donation

I have the donation button on the footer of the page that I would like to have on the actual form because it has a unique ID that will send donation info to other plug in I plan to use (mainly for meter).

https://ww.wp.xz.cn/plugins/personal-fundraiser/

https://ww.wp.xz.cn/plugins/seamless-donations/