My first pc, used the power cables to prevent GPU sag

Can you put the ssd behind the motherboard or in the psu shroud if the case has one?

If you look at the screw holding up the gpu towards the back, i find it helps to stick another small screw or something to fill in the gap to prevent sag. Case manufacturers usually leave a bit of room when they make that hole for compatibility’s sake.

There's an easy way to prevent/reduce GPU sag, by supporting the pins holding the card at the backplate, no need to jerry rig it from the front.

All those cables and the SSD need to go on the back, not the front.