R4i + 3DS/DS RTS Flash Cart help needing to install

Hello people of GBATEMP, Thanks for reading this post

Anyways, recently i bought a flashcart and was wondering how can I install it on my DSI XL firmware 1.4.5A, I've searched online, and I couldn't find anything
Please help!


I attached a photo of the flashcart, so it could be easier to understand my situation, Thanks