You've Really Hit a Sore Spot Here ......................
.................. as I've spent half a lifetime and a small fortune trying to install a backsplash on our 1999 H310. The final outcome is that there's just not enough room between the counter top railing and the back of the faucet to install a backsplash.
Fig.1 shows the splash guard on a 2006 Jeanneau which gave me the idea for the backsplash. Definitely, a thing of beauty. This was the one I attempted to install in our 1999 H310.
Fig. 2 shows a closeup of the bracket (on the Jeanneau) which very nicely supports the acrylic splashguard directly over the centre line of the teak counter rail.
Fig. 3 nicely shows Jeanneau's item 20 as the two brackets, part no. 976457 ($75.48) and with a measley $37.00 shipping charge directly charge from God knows where, so how could I go wrong ? Did I ever go wrong ! ! !

The shipping bill came to $80.00. Fine, I can live with that, it's for my baby. Next, I found there were no fancy chrome plated hex head screws (to hold the acrylic) included in the shipment. Another phone call to the factory to advise them they forgot to ship the two fancy screws. "No" they explained, "that was my fault because I forgot to order them". "Listen you moron" I politely pointed out, "there are no &^%$# screws shown on your exploded diagram." He then kindly pointed out that the two screws would be $3.50 each and the same $80.00 shipping charge all over again. Did I want to order the two screws ? At that point, I told him where to shove the &^%$#* screws :cussing:.
Fig. 4 shows the snug fit behind the faucet on our 1999 H310. After extensive twisting and turning of the two brackets in every conceivable position imaginable, I finally accepted the fact that there just wasn't enough room to install a backsplsh behind the faucet. Another problem was that the vertical cabinet face beneath the counter interfered with the nuts on the bottom of the bracket. You'd have to see it to suffer the full despair of the situation. :cry:
Fig. 5 shows a 2007 H-420 with a very nice splash guard. Note the much larger clearance between the faucet and the teak rail.
Looking at the problem, we decided that most of the flying soap suds and water came from whipping one's hand up to the faucet to quickly rinse off the next soapy dish while washing dishes. For a final solution to avoid sloshing all over the back of the seat in front of the sink, I installed a solenoid valve to supply the faucet with a short shot of cold rinse water. The solenoid valve was triggered by a micro switch mounted against the inside of the cabinet door under the sink. All it takes now is a gentle push of the knee against the cabinet door to activate the rinse water for a second or two. "Look ma, no hands."

When not in use, a power switch to the solenoid is shut off.
So, that was my experience. If, by chance, you happen to have the necessary clearance and there is no interference beneath the location for the brackets, you just might be set up for a successful installation.
As I said in my opening statement, this has opened up a lot of old wounds.