Two or four screws are set at the tank bottom, as shown on the picture below.
This is how your tank can be delivered.
You have to make a front tank support with a folded metal sheet, set as shown on the frame.
NO NEED to weld to do this, only common tools and material.
DO NOT forget silent blocks. Composite never in direct contact with the frame, remember !!
Apparemment vaut mieux faire deux pattes, une de chaque coté, fixées sur les point d'attaches du moteur (en rouge dessin dessous)